Guitar Hero 5: Unlock All Songs. Sep 2, 2009. You can lay any of the 85 songs in Guitar Hero 5 for PS2, PS3, Wii and Xbox 360 under Guitar Hero 5: Unlock All More answers. -Go to the PlayStation Store (outside of game) and buy DLC from there. - Don't forget to look at magazines for codes!!!!!!! Beat the game. Or put in the Unlock all Songs in Quick Play cheat which can be found through the Related Links below, along with other Guitar Hero 3 Cheats. Guitar Hero III is a great game to play if you have a list of cheat codes handy. The game is pretty tough for beginners playing a guitar; hence, Techspirited provides a cheat code list which would ease the gameplay a bit and unlock bonuses. Go ahead and take a look. tFs6.