#TODO: help_string & usage_string: gui/about.cpp gui/browser.cpp gui/chooser.cpp gui/downloaddialog.cpp gui/downloadpacksdialog.cpp gui/editgamedialog.cpp gui/editrecorddialog.cpp gui/filebrowser-dialog.cpp gui/fluidsynth-dialog.cpp gui/gui-manager.cpp gui/launcher.cpp gui/massadd.cpp gui/message.cpp gui/onscreendialog.cpp gui/options.cpp gui/predictivedialog.cpp gui/recorderdialog.cpp gui/remotebrowser.cpp gui/saveload-dialog.cpp gui/shaderbrowser-dialog.cpp gui/themebrowser.cpp gui/ThemeEngine.cpp gui/unknown-game-dialog.cpp gui/updates-dialog.cpp gui/widget.cpp gui/widgets/grid.cpp gui/widgets/groupedlist.cpp base/main.cpp common/error.cpp common/rendermode.cpp common/updates.cpp common/util.cpp dists/scummvm.appdata.xml.cpp engines/achievements.cpp engines/advancedDetector.cpp engines/dialogs.cpp engines/engine.cpp engines/game.cpp engines/metaengine.cpp engines/savestate.cpp graphics/renderer.cpp audio/adlib.cpp audio/fmopl.cpp audio/mididrv.cpp audio/mods/paula.cpp audio/null.cpp audio/null.h audio/softsynth/appleiigs.cpp audio/softsynth/cms.cpp audio/softsynth/fluidsynth.cpp audio/softsynth/fmtowns_pc98/towns_pc98_plugins.cpp audio/softsynth/mt32.cpp audio/softsynth/pcspk.cpp audio/softsynth/sid.cpp backends/cloud/cloudmanager.cpp backends/cloud/storage.cpp backends/dialogs/gtk/gtk-dialogs.cpp backends/dialogs/macosx/macosx-dialogs.mm backends/dialogs/win32/win32-dialogs.cpp backends/events/default/default-events.cpp backends/events/gph/gph-events.cpp backends/events/maemosdl/maemosdl-events.cpp backends/events/openpandora/op-events.cpp backends/graphics/opengl/opengl-graphics.cpp backends/graphics/openglsdl/openglsdl-graphics.cpp backends/graphics/surfacesdl/surfacesdl-graphics.cpp backends/graphics/sdl/sdl-graphics.cpp backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp backends/keymapper/hardware-input.cpp backends/keymapper/remap-widget.cpp backends/keymapper/virtual-mouse.cpp backends/midi/windows.cpp backends/networking/sdl_net/handlers/createdirectoryhandler.cpp backends/networking/sdl_net/handlers/downloadfilehandler.cpp backends/networking/sdl_net/handlers/filesajaxpagehandler.cpp backends/networking/sdl_net/handlers/filespagehandler.cpp backends/networking/sdl_net/handlers/indexpagehandler.cpp backends/networking/sdl_net/handlers/listajaxhandler.cpp backends/networking/sdl_net/handlers/uploadfilehandler.cpp backends/networking/sdl_net/handlerutils.cpp backends/networking/sdl_net/localwebserver.cpp backends/networking/sdl_net/uploadfileclienthandler.cpp backends/platform/3ds/options-dialog.cpp backends/platform/3ds/osystem-events.cpp backends/platform/android/options.cpp backends/platform/ds/ds-graphics.cpp backends/platform/ds/osystem_ds.cpp backends/platform/ios7/ios7_osys_events.cpp backends/platform/ios7/ios7_osys_main.cpp backends/platform/iphone/osys_events.cpp backends/platform/maemo/maemo.cpp backends/platform/sdl/macosx/appmenu_osx.mm backends/platform/sdl/ps3/ps3.cpp backends/platform/sdl/psp2/psp2.cpp backends/platform/sdl/switch/switch.cpp backends/platform/wii/options.cpp backends/presence/discord/discord.cpp backends/updates/macosx/macosx-updates.mm