Marathon
Marathon is the Apple version of DOOM.
Emulator: Aleph One
Games are downloaded with the script.
To get the games running, make sure to set each game to use the software renderer and disable the enhanced HUD from the Plugins section of the Environment menu. For Marathon 1, disable both HUDs from the Plugins menu, start a game, quit back to the title screen and enable Enhanced HUD and it will work and properly.
Keyboard, mouse and joystick all supported.