End current level
Type this inside a game level and press return: goto
Fly Mode
Type this inside a game level and press return: fly
Automatic movement and firing
This will work until player makes a movement and fires a shot. Type this inside a game level and press return: robot
Slow Game Speed
Type this inside a game level and press return: slow
Slower Than That Game Speed
Type this inside a game level and press return: slowww
End game and go back to the desktop
Type this inside a game level and press return: dload
Slowest Game Speed
Type this inside a game level and press return: slowwww
Slower Game Speed
Type this inside a game level and press return: sloww
Normal Game Speed
Type this inside a game level and press return: normal
Create a Centipede nearby
Type this inside a game level and press return: pede
Infinite Lives
During gameplay, enter this code and hit ENTER: getalife.