Marathon Demo Cheats
Level Select
While pressing “new game” just hold the “options” and the “command” key down and choose a level from the box. (between 0 and 36)
Cheat Codes (only for demo)
pzbxay
Gives you an “alien weapon”.
fisheye
Gives you a fisheye point of view.
aslag
Gives you the rocket launcher.
ammo
Replenish your ammunition.
havesome
Makes you invincible for a short time.