Well, I finally find how to play Rayman 2D Prototype levels (There were exist
two of them). This prototype is hidden in original Rayman 2 PS1 game. This
works whit GameShark/Action Replay codes.
(1. Activate the code for the level of your choice in the main menu or the pause menu of the game.
2. Select the Load Game option and load any of your saved games.
3. The game will load the selected stage instead of loading the Hall Of Doors!
This topic were copied from raymanpc.com/forum)
Here is the original post (
http://www.raymanpc.com/forum/viewtopic.php?f=13&t=7064) Hope this wasn't old information.