Back to the Future 3 Game System: Commodore Amiga Cheat Category: Cheat Game Company: Image Works Game Category: Action Hint, Cheat, Walkthrough:   Back to the Future 3 While the story board is showing type the following to reach the various levels. Another source says that you type these passwords while on that level to obtain infinite lives. Level 1 - ROTTEN CHEAT Level 2 - LOUSY CHEAT Level 3 - LOW DOWN CHEAT