Fixes for new two-dash long command line arguments

- Fixes some single-dash leftovers that were missed in the previous commit
- Reorder the help output for clarity, and document missing options
- Drop obsolete options: --noop, --pack, --editor-scene, --level, --import, --import-script, --no-quit
- Improve error message on malformed arguments and do not display help on error
- Always use long form of arguments when starting a new Godot process from C++, for clarity and easy grepping
- Cleanup obsolete code here and there

16 files changed, 165 insertions, 278 deletions

diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index 185c2e670c..1c9eef3d16 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -2534,11 +2534,6 @@ float _Engine::get_frames_per_second() const {
 	return Engine::get_singleton()->get_frames_per_second();
 }
 
-String _Engine::get_custom_level() const {
-
-	return Engine::get_singleton()->get_custom_level();
-}
-
 void _Engine::set_time_scale(float p_scale) {
 	Engine::get_singleton()->set_time_scale(p_scale);
 }
@@ -2588,8 +2583,6 @@ void _Engine::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_time_scale", "time_scale"), &_Engine::set_time_scale);
 	ClassDB::bind_method(D_METHOD("get_time_scale"), &_Engine::get_time_scale);
 
-	ClassDB::bind_method(D_METHOD("get_custom_level"), &_Engine::get_custom_level);
-
 	ClassDB::bind_method(D_METHOD("get_frames_drawn"), &_Engine::get_frames_drawn);
 	ClassDB::bind_method(D_METHOD("get_frames_per_second"), &_Engine::get_frames_per_second);
 
diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h
index 71038cd5a6..d3314cc3b3 100644
--- a/core/bind/core_bind.h
+++ b/core/bind/core_bind.h
@@ -639,8 +639,6 @@ public:
 	void set_time_scale(float p_scale);
 	float get_time_scale();
 
-	String get_custom_level() const;
-
 	MainLoop *get_main_loop() const;
 
 	Dictionary get_version_info() const;
diff --git a/core/engine.h b/core/engine.h
index 1a07f5d1df..c46ae1cb64 100644
--- a/core/engine.h
+++ b/core/engine.h
@@ -39,7 +39,6 @@ class Engine {
 
 	friend class Main;
 
-	String _custom_level;
 	uint64_t frames_drawn;
 	uint32_t _frame_delay;
 	uint64_t _frame_ticks;
@@ -70,8 +69,6 @@ public:
 
 	virtual float get_frames_per_second() const { return _fps; }
 
-	String get_custom_level() const { return _custom_level; }
-
 	uint64_t get_frames_drawn();
 
 	uint64_t get_fixed_frames() const { return _fixed_frames; }
diff --git a/doc/base/classes.xml b/doc/base/classes.xml
index f21fa2c7c0..2912a3f0a4 100644
--- a/doc/base/classes.xml
+++ b/doc/base/classes.xml
@@ -14960,13 +14960,6 @@
 	<description>
 	</description>
 	<methods>
-		<method name="get_custom_level" qualifiers="const">
-			<return type="String">
-			</return>
-			<description>
-				Returns the value of the commandline argument "-level".
-			</description>
-		</method>
 		<method name="get_frames_drawn">
 			<return type="int">
 			</return>
diff --git a/editor/editor_export.cpp b/editor/editor_export.cpp
index fe1dfa281c..d8d3554612 100644
--- a/editor/editor_export.cpp
+++ b/editor/editor_export.cpp
@@ -229,17 +229,17 @@ void EditorExportPlatform::gen_debug_flags(Vector<String> &r_flags, int p_flags)
 	if (p_flags & DEBUG_FLAG_DUMB_CLIENT) {
 		int port = EditorSettings::get_singleton()->get("filesystem/file_server/port");
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
-		r_flags.push_back("-rfs");
+		r_flags.push_back("--remote-fs");
 		r_flags.push_back(host + ":" + itos(port));
 		if (passwd != "") {
-			r_flags.push_back("-rfs_pass");
+			r_flags.push_back("--remote-fs-password");
 			r_flags.push_back(passwd);
 		}
 	}
 
 	if (p_flags & DEBUG_FLAG_REMOTE_DEBUG) {
 
-		r_flags.push_back("-rdebug");
+		r_flags.push_back("--remote-debug");
 
 		r_flags.push_back(host + ":" + String::num(remote_port));
 
@@ -248,7 +248,7 @@ void EditorExportPlatform::gen_debug_flags(Vector<String> &r_flags, int p_flags)
 
 		if (breakpoints.size()) {
 
-			r_flags.push_back("-bp");
+			r_flags.push_back("--breakpoints");
 			String bpoints;
 			for (const List<String>::Element *E = breakpoints.front(); E; E = E->next()) {
 
@@ -263,12 +263,12 @@ void EditorExportPlatform::gen_debug_flags(Vector<String> &r_flags, int p_flags)
 
 	if (p_flags & DEBUG_FLAG_VIEW_COLLISONS) {
 
-		r_flags.push_back("-debugcol");
+		r_flags.push_back("--debug-collisions");
 	}
 
 	if (p_flags & DEBUG_FLAG_VIEW_NAVIGATION) {
 
-		r_flags.push_back("-debugnav");
+		r_flags.push_back("--debug-navigation");
 	}
 }
 
@@ -714,17 +714,17 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 	if (p_flags & DEBUG_FLAG_DUMB_CLIENT) {
 		int port = EditorSettings::get_singleton()->get("filesystem/file_server/port");
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
-		r_flags.push_back("-rfs");
+		r_flags.push_back("--remote-fs");
 		r_flags.push_back(host + ":" + itos(port));
 		if (passwd != "") {
-			r_flags.push_back("-rfs_pass");
+			r_flags.push_back("--remote-fs-password");
 			r_flags.push_back(passwd);
 		}
 	}
 
 	if (p_flags & DEBUG_FLAG_REMOTE_DEBUG) {
 
-		r_flags.push_back("-rdebug");
+		r_flags.push_back("--remote-debug");
 
 		r_flags.push_back(host + ":" + String::num(remote_port));
 
@@ -733,7 +733,7 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 
 		if (breakpoints.size()) {
 
-			r_flags.push_back("-bp");
+			r_flags.push_back("--breakpoints");
 			String bpoints;
 			for (const List<String>::Element *E = breakpoints.front(); E; E = E->next()) {
 
@@ -748,12 +748,12 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 
 	if (p_flags & DEBUG_FLAG_VIEW_COLLISONS) {
 
-		r_flags.push_back("-debugcol");
+		r_flags.push_back("--debug-collisions");
 	}
 
 	if (p_flags & DEBUG_FLAG_VIEW_NAVIGATION) {
 
-		r_flags.push_back("-debugnav");
+		r_flags.push_back("--debug-navigation");
 	}
 }
 EditorExportPlatform::EditorExportPlatform() {
@@ -2231,17 +2231,17 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 	if (p_flags&EXPORT_DUMB_CLIENT) {
 		int port = EditorSettings::get_singleton()->get("filesystem/file_server/port");
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
-		r_flags.push_back("-rfs");
+		r_flags.push_back("--remote-fs");
 		r_flags.push_back(host+":"+itos(port));
 		if (passwd!="") {
-			r_flags.push_back("-rfs_pass");
+			r_flags.push_back("--remote-fs-password");
 			r_flags.push_back(passwd);
 		}
 	}
 
 	if (p_flags&EXPORT_REMOTE_DEBUG) {
 
-		r_flags.push_back("-rdebug");
+		r_flags.push_back("--remote-debug");
 
 		r_flags.push_back(host+":"+String::num(remote_port));
 
@@ -2251,7 +2251,7 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 
 		if (breakpoints.size()) {
 
-			r_flags.push_back("-bp");
+			r_flags.push_back("--breakpoints");
 			String bpoints;
 			for(const List<String>::Element *E=breakpoints.front();E;E=E->next()) {
 
@@ -2267,12 +2267,12 @@ void EditorExportPlatform::gen_export_flags(Vector<String> &r_flags, int p_flags
 
 	if (p_flags&EXPORT_VIEW_COLLISONS) {
 
-		r_flags.push_back("-debugcol");
+		r_flags.push_back("--debug-collisions");
 	}
 
 	if (p_flags&EXPORT_VIEW_NAVIGATION) {
 
-		r_flags.push_back("-debugnav");
+		r_flags.push_back("--debug-navigation");
 	}
 
 
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index adf6d8e06f..6f29a8695c 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -1851,47 +1851,6 @@ void EditorNode::_run(bool p_current, const String &p_custom) {
 	_playing_edited = p_current;
 }
 
-void EditorNode::_cleanup_scene() {
-
-#if 0
-	Node *scene = editor_data.get_edited_scene_root();
-	editor_selection->clear();
-	editor_data.clear_editor_states();
-	editor_history.clear();
-	_hide_top_editors();
-	animation_editor->cleanup();
-	property_editor->edit(NULL);
-	resources_dock->cleanup();
-	scene_import_metadata.unref();
-	//set_edited_scene(NULL);
-	if (scene) {
-		if (scene->get_filename()!="") {
-			previous_scenes.push_back(scene->get_filename());
-		}
-
-		memdelete(scene);
-	}
-	editor_data.get_undo_redo().clear_history();
-	saved_version=editor_data.get_undo_redo().get_version();
-	run_settings_dialog->set_run_mode(0);
-	run_settings_dialog->set_custom_arguments("-l $scene");
-
-	List<Ref<Resource> > cached;
-	ResourceCache::get_cached_resources(&cached);
-
-	for(List<Ref<Resource> >::Element *E=cached.front();E;E=E->next()) {
-
-		String path = E->get()->get_path();
-		if (path.is_resource_file()) {
-			ERR_PRINT(("Stray resource not cleaned:"+path).utf8().get_data());
-		}
-
-	}
-
-	_update_title();
-#endif
-}
-
 void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 
 	//print_line("option "+itos(p_option)+" confirm "+itos(p_confirmed));
@@ -1915,8 +1874,6 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 			_scene_tab_changed(idx);
 			editor_data.clear_editor_states();
 
-			//_cleanup_scene();
-
 		} break;
 		case FILE_NEW_INHERITED_SCENE:
 		case FILE_OPEN_SCENE: {
@@ -2737,8 +2694,6 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 
 				import_reload_fn = scene->get_filename();
 				_save_scene(import_reload_fn);
-				_cleanup_scene();
-
 
 			}
 
@@ -3328,8 +3283,6 @@ Error EditorNode::load_scene(const String &p_scene, bool p_ignore_broken_deps, b
 		_scene_tab_changed(idx);
 	}
 
-	//_cleanup_scene(); // i'm sorry but this MUST happen to avoid modified resources to not be reloaded.
-
 	dependency_errors.clear();
 
 	Ref<PackedScene> sdata = ResourceLoader::load(lpath, "", true);
diff --git a/editor/editor_run.cpp b/editor/editor_run.cpp
index 979aa351e1..9a0731eb55 100644
--- a/editor/editor_run.cpp
+++ b/editor/editor_run.cpp
@@ -58,7 +58,7 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 	args.push_back(itos(OS::get_singleton()->get_process_id()));
 
 	if (debug_collisions) {
-		args.push_back("--debug-collision");
+		args.push_back("--debug-collisions");
 	}
 
 	if (debug_navigation) {
@@ -66,7 +66,6 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 	}
 
 	int screen = EditorSettings::get_singleton()->get("run/window_placement/screen");
-
 	if (screen == 0) {
 		screen = OS::get_singleton()->get_current_screen();
 	} else {
@@ -78,7 +77,6 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 	screen_rect.size = OS::get_singleton()->get_screen_size(screen);
 
 	Size2 desired_size;
-
 	desired_size.x = ProjectSettings::get_singleton()->get("display/window/size/width");
 	desired_size.y = ProjectSettings::get_singleton()->get("display/window/size/height");
 
@@ -95,39 +93,39 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 	switch (window_placement) {
 		case 0: { // top left
 
-			args.push_back("-p");
-			args.push_back(itos(screen_rect.position.x) + "x" + itos(screen_rect.position.y));
+			args.push_back("--position");
+			args.push_back(itos(screen_rect.position.x) + "," + itos(screen_rect.position.y));
 		} break;
 		case 1: { // centered
 			Vector2 pos = screen_rect.position + ((screen_rect.size - desired_size) / 2).floor();
-			args.push_back("-p");
+			args.push_back("--position");
 			args.push_back(itos(pos.x) + "," + itos(pos.y));
 		} break;
 		case 2: { // custom pos
 			Vector2 pos = EditorSettings::get_singleton()->get("run/window_placement/rect_custom_position");
 			pos += screen_rect.position;
-			args.push_back("-p");
+			args.push_back("--position");
 			args.push_back(itos(pos.x) + "," + itos(pos.y));
 		} break;
 		case 3: { // force maximized
 			Vector2 pos = screen_rect.position;
-			args.push_back("-p");
+			args.push_back("--position");
 			args.push_back(itos(pos.x) + "," + itos(pos.y));
-			args.push_back("-m");
+			args.push_back("--maximized");
 
 		} break;
 		case 4: { // force fullscreen
 
 			Vector2 pos = screen_rect.position;
-			args.push_back("-p");
+			args.push_back("--position");
 			args.push_back(itos(pos.x) + "," + itos(pos.y));
-			args.push_back("-f");
+			args.push_back("--fullscreen");
 		} break;
 	}
 
 	if (p_breakpoints.size()) {
 
-		args.push_back("-b");
+		args.push_back("--breakpoints");
 		String bpoints;
 		for (const List<String>::Element *E = p_breakpoints.front(); E; E = E->next()) {
 
@@ -152,7 +150,7 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 
 	String exec = OS::get_singleton()->get_executable_path();
 
-	printf("running: %ls", exec.c_str());
+	printf("Running: %ls", exec.c_str());
 	for (List<String>::Element *E = args.front(); E; E = E->next()) {
 
 		printf(" %ls", E->get().c_str());
diff --git a/editor/run_settings_dialog.cpp b/editor/run_settings_dialog.cpp
index 4548ae0939..dfb152d40b 100644
--- a/editor/run_settings_dialog.cpp
+++ b/editor/run_settings_dialog.cpp
@@ -88,7 +88,5 @@ RunSettingsDialog::RunSettingsDialog() {
 	get_ok()->set_text(TTR("Close"));
 	//get_cancel()->set_text("Close");
 
-	arguments->set_text("-l $scene");
-
 	set_title(TTR("Scene Run Settings"));
 }
diff --git a/main/main.cpp b/main/main.cpp
index a09fd69473..e49c66dddf 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -28,6 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 #include "main.h"
+
 #include "app_icon.gen.h"
 #include "core/register_core_types.h"
 #include "drivers/register_driver_types.h"
@@ -110,6 +111,7 @@ static bool force_lowdpi = false;
 static int init_screen = -1;
 static bool use_vsync = true;
 static bool editor = false;
+static bool show_help = false;
 
 static OS::ProcessID allow_focus_steal_pid = 0;
 
@@ -128,63 +130,88 @@ static String unescape_cmdline(const String &p_str) {
 
 void Main::print_help(const char *p_binary) {
 
-	OS::get_singleton()->print(VERSION_FULL_NAME " (c) 2008-2017 Juan Linietsky, Ariel Manzur.\n");
+	OS::get_singleton()->print(VERSION_FULL_NAME " - https://godotengine.org\n");
+	OS::get_singleton()->print("(c) 2007-2017 Juan Linietsky, Ariel Manzur.\n");
+	OS::get_singleton()->print("(c) 2014-2017 Godot Engine contributors.\n");
+	OS::get_singleton()->print("\n");
 	OS::get_singleton()->print("Usage: %s [options] [path to scene or 'project.godot' file]\n", p_binary);
-	OS::get_singleton()->print("Options:\n");
+	OS::get_singleton()->print("\n");
+
+	OS::get_singleton()->print("General options:\n");
 	OS::get_singleton()->print("  -h, --help                       Display this help message.\n");
-	OS::get_singleton()->print("  --path <directory>               Path to the project (<directory> must contain a 'project.godot' file).\n");
+	OS::get_singleton()->print("  -v, --verbose                    Use verbose stdout mode.\n");
+	OS::get_singleton()->print("  --quiet                          Quiet mode, silences stdout messages. Errors are still displayed.\n");
+	OS::get_singleton()->print("\n");
+
+	OS::get_singleton()->print("Run options:\n");
 #ifdef TOOLS_ENABLED
-	OS::get_singleton()->print("  -e, --editor                     Bring up the editor instead of running the scene.\n");
+	OS::get_singleton()->print("  -e, --editor                     Start the editor instead of running the scene.\n");
+	OS::get_singleton()->print("  -p, --project-manager            Start the project manager, even if a project is auto-detected.\n");
 #endif
-	OS::get_singleton()->print("  --test <test>                    Run a test (");
-	const char **test_names = tests_get_names();
-	const char *coma = "";
-	while (*test_names) {
-
-		OS::get_singleton()->print("%s'%s'", coma, *test_names);
-		test_names++;
-		coma = ", ";
+	OS::get_singleton()->print("  -l, --language <locale>          Use a specific locale (<locale> being a two-letter code).\n");
+	OS::get_singleton()->print("  --path <directory>               Path to a project (<directory> must contain a 'project.godot' file).\n");
+	OS::get_singleton()->print("  --main-pack <file>               Path to a pack (.pck) file to load.\n");
+	OS::get_singleton()->print("  --render-thread <mode>           Render thread mode ('unsafe', 'safe', 'separate').\n");
+	OS::get_singleton()->print("  --remote-fs <address>            Remote filesystem (<host/IP>[:<port>] address).\n");
+	OS::get_singleton()->print("  --remote-fs-password <password>  Password for remote filesystem.\n");
+	OS::get_singleton()->print("  --audio-driver <driver>          Audio driver (");
+	for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
+		if (i != 0)
+			OS::get_singleton()->print(", ");
+		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_audio_driver_name(i));
 	}
 	OS::get_singleton()->print(").\n");
-
-	OS::get_singleton()->print("  -r, --resolution <W>x<H>         Request window resolution.\n");
-	OS::get_singleton()->print("  -p, --position <X>,<Y>           Request window position.\n");
-	OS::get_singleton()->print("  -f, --fullscreen                 Request fullscreen mode.\n");
-	OS::get_singleton()->print("  -m, --maximized                  Request a maximized window.\n");
-	OS::get_singleton()->print("  -w, --windowed                   Request windowed mode.\n");
 	OS::get_singleton()->print("  --video-driver <driver>          Video driver (");
 	for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
-
 		if (i != 0)
 			OS::get_singleton()->print(", ");
 		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_video_driver_name(i));
 	}
 	OS::get_singleton()->print(").\n");
-	OS::get_singleton()->print("  --low-dpi                        Force low-DPI mode (macOS only).\n");
+	OS::get_singleton()->print("\n");
 
-	OS::get_singleton()->print("  --audio-driver <driver>          Audio driver (");
-	for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
+	OS::get_singleton()->print("Display options:\n");
+	OS::get_singleton()->print("  -f, --fullscreen                 Request fullscreen mode.\n");
+	OS::get_singleton()->print("  -m, --maximized                  Request a maximized window.\n");
+	OS::get_singleton()->print("  -w, --windowed                   Request windowed mode.\n");
+	OS::get_singleton()->print("  --resolution <W>x<H>             Request window resolution.\n");
+	OS::get_singleton()->print("  --position <X>,<Y>               Request window position.\n");
+	OS::get_singleton()->print("  --low-dpi                        Force low-DPI mode (macOS only).\n");
+	OS::get_singleton()->print("  --no-window                      Disable window creation (Windows only). Useful together with --script.\n");
+	OS::get_singleton()->print("\n");
 
-		if (i != 0)
-			OS::get_singleton()->print(", ");
-		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_audio_driver_name(i));
-	}
-	OS::get_singleton()->print(").\n");
-	OS::get_singleton()->print("  --render-thread <mode>           Render thread mode ('unsafe', 'safe', 'separate').\n");
-	OS::get_singleton()->print("  -s, --script <script>            Run a script.\n");
+	OS::get_singleton()->print("Debug options:\n");
 	OS::get_singleton()->print("  -d, --debug                      Debug (local stdout debugger).\n");
+	OS::get_singleton()->print("  -b, --breakpoints                Breakpoint list as source::line comma-separated pairs, no spaces (use %%20 instead).\n");
+	OS::get_singleton()->print("  --profiling                      Enable profiling in the script debugger.\n");
+	OS::get_singleton()->print("  --remote-debug <address>         Remote debug (<host/IP>:<port> address).\n");
+#ifdef DEBUG_ENABLED
+	OS::get_singleton()->print("  --debug-collisions               Show collisions shapes when running the scene.\n");
+	OS::get_singleton()->print("  --debug-navigation               Show navigation polygons when running the scene.\n");
+#endif
 	OS::get_singleton()->print("  --frame-delay <ms>               Simulate high CPU load (delay each frame by <ms> milliseconds).\n");
 	OS::get_singleton()->print("  --time-scale <scale>             Force time scale (higher values are faster, 1.0 is normal speed).\n");
-	OS::get_singleton()->print("  -b, --breakpoints                Breakpoint list as source::line comma-separated pairs, no spaces (use %%20, %%2C, ... instead).\n");
-	OS::get_singleton()->print("  -v, --verbose                    Use verbose stdout mode.\n");
-	OS::get_singleton()->print("  -l, --language <locale>          Use a specific locale (<locale> being a two-letter code).\n");
-	OS::get_singleton()->print("  --remote-debug <address>         Remote debug (<ip>:<port> host address).\n");
-	OS::get_singleton()->print("  --remote-fs <host/IP>[:<port>]   Remote filesystem.\n");
-	OS::get_singleton()->print("  --remote-fs-password <password>  Password for remote filesystem.\n");
+	OS::get_singleton()->print("\n");
+
+	OS::get_singleton()->print("Standalone tools:\n");
+	OS::get_singleton()->print("  -s, --script <script>            Run a script.\n");
 #ifdef TOOLS_ENABLED
+	OS::get_singleton()->print("  --export <target>                Export the project using the given export target.\n");
+	OS::get_singleton()->print("  --export-debug                   Use together with --export, enables debug mode for the template.\n");
 	OS::get_singleton()->print("  --doctool <file>                 Dump the whole engine API to <file> in XML format. If <file> exists, it will be merged.\n");
 	OS::get_singleton()->print("  --no-docbase                     Disallow dumping the base types (used with --doctool).\n");
-	OS::get_singleton()->print("  --export <target>                Export the project using the given export target.\n");
+#ifdef DEBUG_METHODS_ENABLED
+	OS::get_singleton()->print("  --gdnative-generate-json-api     Generate JSON dump of the Godot API for GDNative bindings.\n");
+#endif
+	OS::get_singleton()->print("  --test <test>                    Run a unit test (");
+	const char **test_names = tests_get_names();
+	const char *comma = "";
+	while (*test_names) {
+		OS::get_singleton()->print("%s'%s'", comma, *test_names);
+		test_names++;
+		comma = ", ";
+	}
+	OS::get_singleton()->print(").\n");
 #endif
 }
 
@@ -254,15 +281,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	String remotefs;
 	String remotefs_pass;
 
-	String screen = "";
-
-	List<String> pack_list;
 	Vector<String> breakpoints;
 	bool use_custom_res = true;
 	bool force_res = false;
 
-	I = args.front();
-
 	packed_data = PackedData::get_singleton();
 	if (!packed_data)
 		packed_data = memnew(PackedData);
@@ -279,18 +301,17 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	packed_data->add_pack_source(zip_packed_data);
 #endif
 
+	I = args.front();
 	while (I) {
 
 		List<String>::Element *N = I->next();
 
-		if (I->get() == "--noop") {
-
-			// no op
-		} else if (I->get() == "-h" || I->get() == "--help" || I->get() == "/?") { // display help
+		if (I->get() == "-h" || I->get() == "--help" || I->get() == "/?") { // display help
 
+			show_help = true;
 			goto error;
 
-		} else if (I->get() == "-r" || I->get() == "--resolution") { // force resolution
+		} else if (I->get() == "--resolution") { // force resolution
 
 			if (I->next()) {
 
@@ -298,16 +319,16 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				if (vm.find("x") == -1) { // invalid parameter format
 
-					OS::get_singleton()->print("Invalid resolution argument: %s\n", vm.utf8().get_data());
+					OS::get_singleton()->print("Invalid resolution '%s', it should be e.g. '1280x720'.\n", vm.utf8().get_data());
 					goto error;
 				}
 
 				int w = vm.get_slice("x", 0).to_int();
 				int h = vm.get_slice("x", 1).to_int();
 
-				if (w == 0 || h == 0) {
+				if (w <= 0 || h <= 0) {
 
-					OS::get_singleton()->print("Invalid resolution, width and height must be above 0\n");
+					OS::get_singleton()->print("Invalid resolution '%s', width and height must be above 0.\n", vm.utf8().get_data());
 					goto error;
 				}
 
@@ -317,10 +338,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				N = I->next()->next();
 			} else {
-				OS::get_singleton()->print("Invalid resolution argument, needs resolution\n");
+				OS::get_singleton()->print("Missing resolution argument, aborting.\n");
 				goto error;
 			}
-		} else if (I->get() == "-p" || I->get() == "--position") { // position
+		} else if (I->get() == "--position") { // set window position
 
 			if (I->next()) {
 
@@ -328,7 +349,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				if (vm.find(",") == -1) { // invalid parameter format
 
-					OS::get_singleton()->print("Invalid position argument: %s\n", vm.utf8().get_data());
+					OS::get_singleton()->print("Invalid position '%s', it should be e.g. '80,128'.\n", vm.utf8().get_data());
 					goto error;
 				}
 
@@ -340,7 +361,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				N = I->next()->next();
 			} else {
-				OS::get_singleton()->print("Invalid position argument, needs position\n");
+				OS::get_singleton()->print("Missing position argument, aborting.\n");
 				goto error;
 			}
 
@@ -350,7 +371,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		} else if (I->get() == "-w" || I->get() == "--windowed") { // force windowed window
 
 			init_windowed = true;
-		} else if (I->get() == "--profile") { // enable profiler
+		} else if (I->get() == "--profiling") { // enable profiling
 
 			use_debug_profiler = true;
 		} else if (I->get() == "--video-driver") { // force video driver
@@ -360,7 +381,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				video_driver = I->next()->get();
 				N = I->next()->next();
 			} else {
-				OS::get_singleton()->print("Invalid --video-driver argument, needs driver name\n");
+				OS::get_singleton()->print("Missing video driver argument, aborting.\n");
 				goto error;
 			}
 		} else if (I->get() == "-l" || I->get() == "--language") { // language
@@ -370,10 +391,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				locale = I->next()->get();
 				N = I->next()->next();
 			} else {
-				OS::get_singleton()->print("Invalid language argument, needs language code\n");
+				OS::get_singleton()->print("Missing language argument, aborting.\n");
 				goto error;
 			}
-		} else if (I->get() == "--low-dpi") { // force low DPI
+		} else if (I->get() == "--low-dpi") { // force low DPI (macOS only)
 
 			force_lowdpi = true;
 		} else if (I->get() == "--remote-fs") { // remote filesystem
@@ -383,6 +404,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				remotefs = I->next()->get();
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing remote filesystem address, aborting.\n");
 				goto error;
 			}
 		} else if (I->get() == "--remote-fs-password") { // remote filesystem password
@@ -392,9 +414,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				remotefs_pass = I->next()->get();
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing remote filesystem password, aborting.\n");
 				goto error;
 			}
-		} else if (I->get() == "--render-thread") { // rendering thread
+		} else if (I->get() == "--render-thread") { // render thread mode
 
 			if (I->next()) {
 
@@ -407,6 +430,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing render thread mode argument, aborting.\n");
 				goto error;
 			}
 
@@ -417,6 +441,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				audio_driver = I->next()->get();
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing audio driver argument, aborting.\n");
 				goto error;
 			}
 
@@ -427,7 +452,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		} else if (I->get() == "-e" || I->get() == "--editor") { // starts editor
 
 			editor = true;
-		} else if (I->get() == "--no-window") { // disable window creation
+		} else if (I->get() == "--no-window") { // disable window creation, Windows only
 
 			OS::get_singleton()->set_no_window_mode(true);
 		} else if (I->get() == "--quiet") { // quieter output
@@ -447,6 +472,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				}
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing relative or absolute path, aborting.\n");
 				goto error;
 			}
 		} else if (I->get().ends_with("project.godot")) {
@@ -474,6 +500,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				breakpoints = bplist.split(",");
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing list of breakpoints, aborting.\n");
 				goto error;
 			}
 
@@ -484,6 +511,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				frame_delay = I->next()->get().to_int();
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing frame delay argument, aborting.\n");
 				goto error;
 			}
 
@@ -494,20 +522,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				Engine::get_singleton()->set_time_scale(I->next()->get().to_double());
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing time scale argument, aborting.\n");
 				goto error;
 			}
 
-		} else if (I->get() == "--pack") {
-
-			if (I->next()) {
-
-				pack_list.push_back(I->next()->get());
-				N = I->next()->next();
-			} else {
-
-				goto error;
-			};
-
 		} else if (I->get() == "--main-pack") {
 
 			if (I->next()) {
@@ -515,46 +533,39 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				main_pack = I->next()->get();
 				N = I->next()->next();
 			} else {
-
+				OS::get_singleton()->print("Missing path to main pack file, aborting.\n");
 				goto error;
 			};
 
-		} else if (I->get() == "--debug" || I->get() == "-d") {
+		} else if (I->get() == "-d" || I->get() == "--debug") {
 			debug_mode = "local";
 #ifdef DEBUG_ENABLED
-		} else if (I->get() == "--debug-collision") {
+		} else if (I->get() == "--debug-collisions") {
 			debug_collisions = true;
 		} else if (I->get() == "--debug-navigation") {
 			debug_navigation = true;
 #endif
-		} else if (I->get() == "--editor-scene") {
-
-			if (I->next()) {
-
-				ProjectSettings::get_singleton()->set("editor_scene", game_path = I->next()->get());
-			} else {
-				goto error;
-			}
-
 		} else if (I->get() == "--remote-debug") {
 			if (I->next()) {
 
 				debug_mode = "remote";
 				debug_host = I->next()->get();
-				if (debug_host.find(":") == -1) { //wrong host
-					OS::get_singleton()->print("Invalid debug host string\n");
+				if (debug_host.find(":") == -1) { // wrong address
+					OS::get_singleton()->print("Invalid debug host address, it should be of the form <host/IP>:<port>.\n");
 					goto error;
 				}
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing remote debug host address, aborting.\n");
 				goto error;
 			}
-		} else if (I->get() == "--allow_focus_steal_pid") {
+		} else if (I->get() == "--allow_focus_steal_pid") { // not exposed to user
 			if (I->next()) {
 
 				allow_focus_steal_pid = I->next()->get().to_int64();
 				N = I->next()->next();
 			} else {
+				OS::get_singleton()->print("Missing editor PID argument, aborting.\n");
 				goto error;
 			}
 		} else {
@@ -618,7 +629,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 		Error err = file_access_network_client->connect(remotefs, port, remotefs_pass);
 		if (err) {
-			OS::get_singleton()->printerr("Could not connect to remotefs: %s:%i\n", remotefs.utf8().get_data(), port);
+			OS::get_singleton()->printerr("Could not connect to remotefs: %s:%i.\n", remotefs.utf8().get_data(), port);
 			goto error;
 		}
 
@@ -654,7 +665,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 #ifdef TOOLS_ENABLED
 		editor = false;
 #else
-		OS::get_singleton()->print("error: Couldn't load game path '%s'\n", game_path.ascii().get_data());
+		OS::get_singleton()->print("Error: Could not load game path '%s'.\n", game_path.ascii().get_data());
 
 		goto error;
 #endif
@@ -744,11 +755,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		OS::get_singleton()->_render_thread_mode = OS::RenderThreadMode(rtm);
 	}
 
-	/* Determine Video Driver */
-
-	if (audio_driver == "") { // specified in project.godot
-		audio_driver = GLOBAL_DEF("audio/driver", OS::get_singleton()->get_audio_driver_name(0));
-	}
+	/* Determine audio and video drivers */
 
 	for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
 
@@ -766,6 +773,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		//goto error;
 	}
 
+	if (audio_driver == "") { // specified in project.godot
+		audio_driver = GLOBAL_DEF("audio/driver", OS::get_singleton()->get_audio_driver_name(0));
+	}
+
 	for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
 
 		if (audio_driver == OS::get_singleton()->get_audio_driver_name(i)) {
@@ -833,7 +844,8 @@ error:
 	args.clear();
 	main_args.clear();
 
-	print_help(execpath);
+	if (show_help)
+		print_help(execpath);
 
 	if (performance)
 		memdelete(performance);
@@ -1053,23 +1065,18 @@ bool Main::start() {
 	String game_path;
 	String script;
 	String test;
-	String screen;
 	String _export_preset;
-	String _import;
-	String _import_script;
-	bool noquit = false;
 	bool export_debug = false;
 	bool project_manager_request = false;
+
 	List<String> args = OS::get_singleton()->get_cmdline_args();
 	for (int i = 0; i < args.size(); i++) {
 		//parameters that do not have an argument to the right
 		if (args[i] == "--no-docbase") {
 			doc_base = false;
-		} else if (args[i] == "--no-quit") {
-			noquit = true;
-		} else if (args[i] == "--editor" || args[i] == "-e") {
+		} else if (args[i] == "-e" || args[i] == "--editor") {
 			editor = true;
-		} else if (args[i] == "-P" || args[i] == "--project-manager") {
+		} else if (args[i] == "-p" || args[i] == "--project-manager") {
 			project_manager_request = true;
 		} else if (args[i].length() && args[i][0] != '-' && game_path == "") {
 			game_path = args[i];
@@ -1081,10 +1088,8 @@ bool Main::start() {
 				doc_tool = args[i + 1];
 				for (int j = i + 2; j < args.size(); j++)
 					removal_docs.push_back(args[j]);
-			} else if (args[i] == "--script" || args[i] == "-s") {
+			} else if (args[i] == "-s" || args[i] == "--script") {
 				script = args[i + 1];
-			} else if (args[i] == "--level" || args[i] == "-l") {
-				Engine::get_singleton()->_custom_level = args[i + 1];
 			} else if (args[i] == "--test") {
 				test = args[i + 1];
 			} else if (args[i] == "--export") {
@@ -1094,12 +1099,6 @@ bool Main::start() {
 				editor = true; //needs editor
 				_export_preset = args[i + 1];
 				export_debug = true;
-			} else if (args[i] == "--import") {
-				editor = true; //needs editor
-				_import = args[i + 1];
-			} else if (args[i] == "--import-script") {
-				editor = true; //needs editor
-				_import_script = args[i + 1];
 			} else {
 				// The parameter does not match anything known, don't skip the next argument
 				parsed_pair = false;
@@ -1205,7 +1204,7 @@ bool Main::start() {
 
 	if (!main_loop) {
 		if (!ClassDB::class_exists(main_loop_type)) {
-			OS::get_singleton()->alert("godot: error: MainLoop type doesn't exist: " + main_loop_type);
+			OS::get_singleton()->alert("Error: MainLoop type doesn't exist: " + main_loop_type);
 			return false;
 		} else {
 
@@ -1355,19 +1354,8 @@ bool Main::start() {
 #ifdef TOOLS_ENABLED
 			if (editor) {
 
-				if (_import != "") {
-
-					//editor_node->import_scene(_import,local_game_path,_import_script);
-					if (!noquit)
-						sml->quit();
-					game_path = ""; //no load anything
-				} else {
-
-					Error serr = editor_node->load_scene(local_game_path);
-				}
+				Error serr = editor_node->load_scene(local_game_path);
 				OS::get_singleton()->set_context(OS::CONTEXT_EDITOR);
-
-				//editor_node->set_edited_scene(game);
 			}
 #endif
 		}
@@ -1441,7 +1429,6 @@ bool Main::start() {
 					n->set_name(name);
 
 					//defer so references are all valid on _ready()
-					//sml->get_root()->add_child(n);
 					to_add.push_back(n);
 
 					if (global_var) {
@@ -1466,7 +1453,6 @@ bool Main::start() {
 
 				ERR_EXPLAIN("Failed loading scene: " + local_game_path);
 				ERR_FAIL_COND_V(!scene, false)
-				//sml->get_root()->add_child(scene);
 				sml->add_current_scene(scene);
 
 				String iconpath = GLOBAL_DEF("application/config/icon", "Variant()");
@@ -1480,27 +1466,6 @@ bool Main::start() {
 		}
 
 #ifdef TOOLS_ENABLED
-
-		/*if (_export_platform!="") {
-
-			sml->quit();
-		}*/
-
-		/*
-		if (sml->get_root_node()) {
-
-			Console *console = memnew( Console );
-
-			sml->get_root_node()->cast_to<RootNode>()->set_console(console);
-			if (GLOBAL_DEF("console/visible_default",false).operator bool()) {
-
-				console->show();
-			} else {P
-
-				console->hide();
-			};
-		}
-*/
 		if (project_manager_request || (script == "" && test == "" && game_path == "" && !editor)) {
 
 			ProjectManager *pmanager = memnew(ProjectManager);
@@ -1509,7 +1474,6 @@ bool Main::start() {
 			sml->get_root()->add_child(pmanager);
 			OS::get_singleton()->set_context(OS::CONTEXT_PROJECTMAN);
 		}
-
 #endif
 	}
 
@@ -1590,10 +1554,6 @@ bool Main::iteration() {
 
 		time_accum -= frame_slice;
 		message_queue->flush();
-		/*
-		if (AudioServer::get_singleton())
-			AudioServer::get_singleton()->update();
-		*/
 
 		fixed_process_ticks = MAX(fixed_process_ticks, OS::get_singleton()->get_ticks_usec() - fixed_begin); // keep the largest one for reference
 		fixed_process_max = MAX(OS::get_singleton()->get_ticks_usec() - fixed_begin, fixed_process_max);
@@ -1642,7 +1602,6 @@ bool Main::iteration() {
 		script_debugger->idle_poll();
 	}
 
-	//x11_delay_usec(10000);
 	frames++;
 	Engine::get_singleton()->_idle_frames++;
 
@@ -1744,7 +1703,6 @@ void Main::cleanup() {
 	unregister_core_driver_types();
 	unregister_core_types();
 
-	//PerformanceMetrics::finish();
 	OS::get_singleton()->clear_last_error();
 	OS::get_singleton()->finalize_core();
 }
diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp
index 3c52834d92..ee93c29577 100644
--- a/platform/android/export/export.cpp
+++ b/platform/android/export/export.cpp
@@ -1220,10 +1220,10 @@ Error EditorExportPlatformAndroid::export_project(const String& p_path, bool p_d
 		/*String host = EditorSettings::get_singleton()->get("filesystem/file_server/host");
 		int port = EditorSettings::get_singleton()->get("filesystem/file_server/post");
 		String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
-		cl.push_back("-rfs");
+		cl.push_back("--remote-fs");
 		cl.push_back(host+":"+itos(port));
 		if (passwd!="") {
-			cl.push_back("-rfs_pass");
+			cl.push_back("--remote-fs-password");
 			cl.push_back(passwd);
 		}*/
 
@@ -1243,10 +1243,10 @@ Error EditorExportPlatformAndroid::export_project(const String& p_path, bool p_d
 			err = save_pack(pf);
 			memdelete(pf);
 
-			cl.push_back("-use_apk_expansion");
-			cl.push_back("-apk_expansion_md5");
+			cl.push_back("--use_apk_expansion");
+			cl.push_back("--apk_expansion_md5");
 			cl.push_back(FileAccess::get_md5(fullpath));
-			cl.push_back("-apk_expansion_key");
+			cl.push_back("--apk_expansion_key");
 			cl.push_back(apk_expansion_pkey.strip_edges());
 
 		} else {
@@ -1262,10 +1262,10 @@ Error EditorExportPlatformAndroid::export_project(const String& p_path, bool p_d
 	}
 
 	if (use_32_fb)
-		cl.push_back("-use_depth_32");
+		cl.push_back("--use_depth_32");
 
 	if (immersive)
-		cl.push_back("-use_immersive");
+		cl.push_back("--use_immersive");
 
 	if (cl.size()) {
 		//add comandline
@@ -3330,10 +3330,10 @@ public:
 			/*String host = EditorSettings::get_singleton()->get("filesystem/file_server/host");
 			int port = EditorSettings::get_singleton()->get("filesystem/file_server/post");
 			String passwd = EditorSettings::get_singleton()->get("filesystem/file_server/password");
-			cl.push_back("-rfs");
+			cl.push_back("--remote-fs");
 			cl.push_back(host+":"+itos(port));
 			if (passwd!="") {
-				cl.push_back("-rfs_pass");
+				cl.push_back("--remote-fs-password");
 				cl.push_back(passwd);
 			}*/
 
@@ -3350,10 +3350,10 @@ public:
 					return OK;
 				}
 
-				cl.push_back("-use_apk_expansion");
-				cl.push_back("-apk_expansion_md5");
+				cl.push_back("--use_apk_expansion");
+				cl.push_back("--apk_expansion_md5");
 				cl.push_back(FileAccess::get_md5(fullpath));
-				cl.push_back("-apk_expansion_key");
+				cl.push_back("--apk_expansion_key");
 				cl.push_back(apk_expansion_pkey.strip_edges());
 
 			} else {
@@ -3367,10 +3367,10 @@ public:
 		}
 
 		if (use_32_fb)
-			cl.push_back("-use_depth_32");
+			cl.push_back("--use_depth_32");
 
 		if (immersive)
-			cl.push_back("-use_immersive");
+			cl.push_back("--use_immersive");
 
 		if (cl.size()) {
 			//add comandline
diff --git a/platform/android/godot_android.cpp b/platform/android/godot_android.cpp
index 6fbd42d7b3..5933b83d06 100644
--- a/platform/android/godot_android.cpp
+++ b/platform/android/godot_android.cpp
@@ -616,7 +616,6 @@ static void engine_handle_cmd(struct android_app *app, int32_t cmd) {
 					//do initialization here, when there's OpenGL! hackish but the only way
 					engine->os = new OS_Android(_gfx_init, engine);
 
-					//char *args[]={"-test","gui",NULL};
 					__android_log_print(ANDROID_LOG_INFO, "godot", "pre asdasd setup...");
 #if 0
 				Error err  = Main::setup("apk",2,args);
diff --git a/platform/android/java/src/org/godotengine/godot/Godot.java b/platform/android/java/src/org/godotengine/godot/Godot.java
index d620b2b9c4..d444d37c2f 100644
--- a/platform/android/java/src/org/godotengine/godot/Godot.java
+++ b/platform/android/java/src/org/godotengine/godot/Godot.java
@@ -387,7 +387,7 @@ public class Godot extends Activity implements SensorEventListener, IDownloaderC
 				new_cmdline = new String[ 2 ];
 			}
 
-			new_cmdline[cll]="-main_pack";
+			new_cmdline[cll]="--main_pack";
 			new_cmdline[cll+1]=expansion_pack_path;
 			command_line=new_cmdline;
 		}
@@ -452,9 +452,9 @@ public class Godot extends Activity implements SensorEventListener, IDownloaderC
 			for(int i=0;i<command_line.length;i++) {
 
 				boolean has_extra = i< command_line.length -1;
-				if (command_line[i].equals("-use_depth_32")) {
+				if (command_line[i].equals("--use_depth_32")) {
 					use_32_bits=true;
-				} else if (command_line[i].equals("-use_immersive")) {
+				} else if (command_line[i].equals("--use_immersive")) {
 					use_immersive=true;
 					if(Build.VERSION.SDK_INT >= 19.0){ // check if the application runs on an android 4.4+
 						window.getDecorView().setSystemUiVisibility(
@@ -467,12 +467,12 @@ public class Godot extends Activity implements SensorEventListener, IDownloaderC
 
 						UiChangeListener();
 					}
-				} else if (command_line[i].equals("-use_apk_expansion")) {
+				} else if (command_line[i].equals("--use_apk_expansion")) {
 					use_apk_expansion=true;
-				} else if (has_extra && command_line[i].equals("-apk_expansion_md5")) {
+				} else if (has_extra && command_line[i].equals("--apk_expansion_md5")) {
 					main_pack_md5=command_line[i+1];
 					i++;
-				} else if (has_extra && command_line[i].equals("-apk_expansion_key")) {
+				} else if (has_extra && command_line[i].equals("--apk_expansion_key")) {
 					main_pack_key=command_line[i+1];
 					SharedPreferences prefs = getSharedPreferences("app_data_keys", MODE_PRIVATE);
 					Editor editor = prefs.edit();
diff --git a/platform/android/java_glue.cpp b/platform/android/java_glue.cpp
index 683e1cfb22..eb139fb471 100644
--- a/platform/android/java_glue.cpp
+++ b/platform/android/java_glue.cpp
@@ -844,7 +844,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_initialize(JNIEnv *en
 				} else {
 					//__android_log_print(ANDROID_LOG_INFO,"godot","cmdline arg %i is: %s\n",i,rawString);
 
-					if (strcmp(rawString, "-main_pack") == 0)
+					if (strcmp(rawString, "--main_pack") == 0)
 						use_apk_expansion = true;
 				}
 
@@ -867,7 +867,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_initialize(JNIEnv *en
 	__android_log_print(ANDROID_LOG_INFO, "godot", "**SETUP");
 
 #if 0
-	char *args[]={"-test","render",NULL};
+	char *args[]={"--test","render",NULL};
 	__android_log_print(ANDROID_LOG_INFO,"godot","pre asdasd setup...");
 	Error err  = Main::setup("apk",2,args,false);
 #else
diff --git a/platform/iphone/view_controller.mm b/platform/iphone/view_controller.mm
index 574598e1d3..921ef8f607 100644
--- a/platform/iphone/view_controller.mm
+++ b/platform/iphone/view_controller.mm
@@ -42,7 +42,7 @@ int add_path(int p_argc, char **p_args) {
 	if (!str)
 		return p_argc;
 
-	p_args[p_argc++] = "-path";
+	p_args[p_argc++] = "--path";
 	[str retain]; // memory leak lol (maybe make it static here and delete it in ViewController destructor? @todo
 	p_args[p_argc++] = (char *)[str cString];
 	p_args[p_argc] = NULL;
diff --git a/platform/uwp/app.cpp b/platform/uwp/app.cpp
index c773c0b746..8824d1c1d0 100644
--- a/platform/uwp/app.cpp
+++ b/platform/uwp/app.cpp
@@ -512,7 +512,7 @@ void App::UpdateWindowSize(Size size) {
 
 char **App::get_command_line(unsigned int *out_argc) {
 
-	static char *fail_cl[] = { "-path", "game", NULL };
+	static char *fail_cl[] = { "--path", "game", NULL };
 	*out_argc = 2;
 
 	FILE *f = _wfopen(L"__cl__.cl", L"rb");
diff --git a/platform/uwp/export/export.cpp b/platform/uwp/export/export.cpp
index 39717196aa..68307c4e90 100644
--- a/platform/uwp/export/export.cpp
+++ b/platform/uwp/export/export.cpp
@@ -1330,7 +1330,7 @@ public:
 		}
 
 		if (!(p_flags & DEBUG_FLAG_DUMB_CLIENT)) {
-			cl.push_back("-path");
+			cl.push_back("--path");
 			cl.push_back("game");
 		}