Shareware doom1.wad
gzdoom.sf2 MIDI SoundFont from gzdoom
Cheats: "idkfa" to get all weapons, "iddqd" for god mode, "idclip" to walk through walls)
More cheat codes
Controls: cursor keys, ctrl or '\' to fire (use \ on mac to avoid ctrl+cursor shortcuts), alt+cursor to strafe, space to open doors