Sony PlayStation: Cheats and Tips
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Bonus Parappa Levels
Beat the game, then return to the level selection screen. Press Right until the bonus Parappa levels appear.

Parappa and Lammy Two Player Levels
Beat all of the bonus Parappa levels.

Make Your Own Lyrics
At the main title screen when you see Lammy with her guitar, reset the PlayStation immediately. When you see the title screen again there will be another option. If you select it you will be able to create your own music.
Submitted by Pickle. 

Above are all the Um Jammer Lammy cheats, codes, tips, hints, secrets and walkthoughs that are currently in the Cheat Chest database. Because we do not have every game for Sony PlayStation, Cheat Chest unfortunately can not guarantee that each Um Jammer Lammy cheat we have works. If any of the cheat codes above is incorrect, please rate the Um Jammer Lammy cheats at our partner site Neon Gaming, as enough bad ratings will automatically remove the cheat from our database.