Hold [Shift] + [Ctrl] and type cheat at
the base screen to enable cheat mode.
CTL+C: Gives 1,000 credits.
CTL+A: Allows buying all weapons (use on base screen)
CTL+N: Level Skip (use on base screen)
CTL+P: Move unit to cursor (use in game)
CTL+I: Invincible (use in game)
CTL+R: Shield Restore (use in game)
CTL+M: Monster toggle (use in game)