Rayman 2: Revolution [PSX]

Cheat mode:
Go to any map except the first and enter the options screen. Select "Sound", highlight the "Mute" option, then hold L1 + R1 and press L2, R2, L2, R2, L2, R2. A cheat menu will appear.

Access multiplayer bonus maps:
In the first map, in the Options Menu/Language/Voices, select the "RAYMANIAN" language (don't validate it), keep L1 + R1 pressed and do the following sequence: L2, R2, L2, R2, L2, R2. A new menu will appear with the three multiplayer bonus maps.

Other cheats:
In any other map, go to the Sound Menu, select the "MUTE" option (again don't validate it), keep L1 + R1 pressed and do the same sequence: L2, R2, L2, R2, L2, R2. A new cheat menu will appear.

Baby Soccer bonus map:
During a game (before it ends), keep L1 + R1 pressed and do the same sequence: L2, R2, L2, R2, L2, R2. The names of the players appear on the baby globox.