Ratchet y Clank

					
Trespasser Gadget:

You will need the Tresspasser Gadget to progress in the main story, this item can be found easily in the sewers of Rilgar.
Unlock Insomniac Museum:

When you have completed the game once you will have access to the Insomniac Museum, it can be accessed by the teleport at the beginning of the game.
Unlock Challenge Mode:

Challenge mode will become an available option when you complete the game once and start a new game. In Challenge mode you will keep your health level, armour, upgrades and weapon mods. Enemies and bosses will have more health and attack power.