1) Press the right mousebutton during the loading: you can see the promo of ROBO COP(??!!!).
2) Press R,O,B,O,C,O,P,P,E,R or R,O,B,O,C,O,P,P,E,T,E,R in the main title screen
for continue game mode
OR
3) Play a game normally at the hi-score screen press D,E,B,B,I,E, ,S for unlimit ed lives. (In any versions this cheat do not
work).
OR
4) Follow the (3) but press M,A,G,E,N,T,A for unlimited lives.
OR
5) If you want read a message of the autor for his girl press contemporanely all functions keys.