God mode

Hold [Command] + [Shift] and type godim.

All weapons

Hold [Command] + [Shift] and type 0wpn.

All keys

Hold [Command] + [Shift] and type 99sesame.

Level select

Hold [Command] + [Shift] when selecting a new game. Levels 1 through 28 are single player, levels 29 through 40 are multi-player.

Level Password

5 NODE
10 PACKET
14 MYCIN
18 EURISKO
23 DEEPBLUE
26 HACKER
29 WIRED