The following cheat codes are available for Rock Band on the PlayStation 2 (PS2) video game console. Cheats for this game are entered at the title screen (where it says Rock Band really big and has the press start to play message at the bottom).
Unlock All Songs
Cheat code: Red, Yellow, Blue, Red, Red, Blue, Blue, Red, Yellow, Blue
Special note: The use of this code will disable game saving for your game session. This code is especially useful if you want to use the Quickplay feature on a console for which you do not have a save file with the songs unlocked.