Ratchet And Clank: All 4 One

Successfully complete the game to unlock the following cheats.

Grief mode: Griefing your friends has never been easier.

Big Head mode: Adjust the size of your heroes' heads (normal/big/biggest/small).

Screen effects: Uses advanced rendering technology to make stuff look old (black and white).

Equip the Critter Strike or Omegatech Frost Cannon and destroy his shield. Then, freeze him or turn him into an animal.
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Complete the following tasks to unlock PlayStation3 trophy rewards.

Keep the Meter Running (Bronze): Don't let the air taxi take damage in Luminopolis.

Bomb Disposal (Silver): Blow up 85% of the exploding crates in Aldaros Plains.

El Matador (Bronze): No one gets hit by a grove beetle in the Deadgrove.

On Some Planets They're a Delicacy (Silver): Shoot all of the slorgs back into the waters of Octonok Cay.

It Was Like That When We Got Here (Bronze): Destroy all of the towers in Gorthon Crater.

A Moment of Reflection (Bronze): Use only Reflectors to destroy the generators in Phonica Moon's security tunnels.

Mission Improbable (Bronze): Get through the laser walls at the end of Uzo City in 45 seconds.

Night Lights are for Wimps (Bronze): Get through Rossa Fields without using any of the energy repositories.

The Mad Plasmabomber (Bronze): Kill eight enemies with one shot.

Pyromancer (Bronze): Barbecue four enemies at the same time using the Pyro Blaster.

Knockout Artist (Bronze): Kill three enemies with one attack using the Blitzer.

Fine, But You're Cleaning Up After Them (Bronze): Get 10 critters on screen at once.

Eight Seconds (Bronze): Kill eight enemies in eight seconds using the Darkstar Fission Tether with two or more teammates.

Zurkon the Legend (Bronze): Kill 100 enemies with Mr. Zurkon out.

Melee Legend (Bronze): Kill 150 enemies with melee.

Q-Force Legend (Bronze): Kill 50 enemies in a row using melee without taking damage.

Doppelbanger Legend (Bronze): Destroy 30 enemies while they're distracted by the Doppelbanger.

Quantum Deflector Legend (Bronze): Absorb 500 shots with the Quantum Deflector.

Zoni Legend (Bronze): Kill 15 enemies that have been slowed down by the Zoni Blaster.

Cloaker Legend (Bronze): Kill 15 enemies while using the Cloaker.

Quick Killer (Bronze): Kill eight enemies in two seconds.

Overload Legend (Bronze): Use the Co-op overload to kill 60 enemies.

Life Support (Bronze): Revive a teammate with one second left on their timer. (2P +)

Friendship through Firepower (Bronze): Buy your first weapon.

Upping your Arsenal (Silver): Buy half of the weapons.

For the Zombie Apocalypse (Gold): Buy all of the weapons.

Tricked Out (Silver): Fully upgrade one weapon.

Upgraded (Gold): Fully upgrade all weapons.

Galactic Hero (Silver): Kill 500 enemies.

Vac-U Legend (Bronze): Kill 50 enemies with the Vac-U 4000.

The Bolt Banker (Silver): Have 100,000 bolts banked.

The First Million is Always the Hardest (Gold): Have 1,000,000 bolts banked.

Waiting Room (Bronze): Reach the lobby. (2P +)

Connected (Bronze): Play an online game. (2P +)

Old-School (Bronze): Play a single-player game.

Couch Potato (Bronze): Play an offline-only game. (2P +)

Additionally there are nine secret trophies.

4 Play (Platinum): Get all of the Trophies in the game.

Intergalactic Tool of Justice (Bronze): Defeat the Z'Grute.

Anyone for Sushi? (Bronze): Defeat the octomoth.

Now We Need a Really Big Tissue (Bronze): Defeat the Wigwump.

Spog 2.0 (Bronze): Defeat Commander Spog.

Now That's a Big Fish (Bronze): Defeat King Sepiad.

Space Cadet (Bronze): Complete Terawatt Forest.

Winter Wonderland (Bronze): Escape the Polar Sea.

The Saviors of Magnus (Gold): Defeat the Loki Master.