Spider-Man 3 Codes -

Cheat mode:
Successfully complete the game in Story mode. The following cheats can now be purchased for 5,000 Hero Points at the store. After they are bought, enter the "Extras" menu to use them.

All enemies are robots 
Alternate touchscreen background 
Always wear the black suit 
Invincibility 
Night-Time mode 

Completion bonus:
Successfully complete the game 100% (with all Ultimate challenges, Shards, Bugles, Spiders, and other bonuses done) to unlock a DeWolfe biography.

Finding all meteor shards:
Successfully complete the game and buy all the unlocked upgrades from the store. Exit to the main menu, go to "Options", and go to "Cheats". Turn "Black Suit" on. You will have the black suit on until the game is turned off, making it much easier to find meteor shards.