1) Press the right mousebutton during the loading: you can see the promo of ROBO
2) Press ROBOCOPPER or ROBOCOPPETER in the main title screen for continue game mode
3) Play a game normally at the hi-score screen press DEBBIE S for unlimited lives. (In all versions this cheat does not work).
4) Follow the (3) but press MAGENTA for unlimited lives.
5) If you want to read a message from the author to his girl press all functions keys.