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• Baroness, Firefly, and Destro

Successfully complete the bonus mission to get their contact cards. They cost 15 battle points each to purchase.

• Bonus mission

Successfully complete the game. After the credits are over, a cinematic featuring Hawk will appear and the bonus mission will be unlocked.

• Cheat Codes

Enter one of the following codes at the main menu or title screen to activate the corresponding cheat function. A sound effect or the phrase "Yo Joe!" will be heard to confirm correct code entry.

Function	How to unlock
Duke classic costume	Press Left, Up, Square, Up, Right, Triangle.
Scarlett classic costume	Press Right, Up, Down(2), Triangle.

• Trophies

Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Acceleration Celebration (Silver)	Activate the Accelerator Suit three times in any mission.
Accomplished Mission (Silver)	Gain the highest Mission Ranking.
All G.I. JOE Contacts (Gold)	Purchase all G.I. JOE contacts.
Arctic Completed (Bronze)	Complete all Arctic missions.
Arishikage Attack (Bronze)	Complete any mission using Snake Eyes and Storm Shadow.
Baroness (Bronze)	Defeat Baroness.
Battle Master (Silver)	Collect and spend all 130 possible Battle Points.
Bevvy o' Heavy (Bronze)	Complete a mission using only Heavy class characters.
COBRAAAA!!! (Gold)	Purchase all COBRA characters.
Classified (Bronze)	Collect all Intel Cards.
Code Cracker (Bronze)	Gain access to a Combat Soldier Class Ability door.
Combat Rock (Bronze)	Complete a mission using only Combat class characters.
Desert Completed (Silver)	Complete all Desert missions.
Destro (Bronze)	Defeat Destro.
Double Barrel Roll (Bronze)	Perform 10 barrel rolls in unison in any level in co-op.
File-o-phile (Bronze)	Collect all File Cards.
Firefly (Bronze)	Defeat Firefly.
G.I. JOE (Platinum)	G.I. JOE.
Gimme The Keys (Bronze)	Drive every G.I. JOE vehicle in the game.
Girls Night Out (Bronze)	Complete any mission using female characters only.
Go Commando (Bronze)	Complete a mission using only Commando class characters.
Hack 'n Slash (Bronze)	Finish a level using only melee attacks on ground troops.
Half the Battle (Bronze)	Collect 50% of all File Cards.
Hardcore G.I. JOE (Silver)	Complete every Mission on Hardcore Difficulty.
Higher Score (Bronze)	Replay a mission and earn a higher score.
It Takes Two (Bronze)	Complete any mission in 2 player co-op.
Jungle Completed (Silver)	Complete all Jungle missions.
Launch Money (Silver)	Launch 50 enemies into the air and kill them.
Lost & Found (Bronze)	Collect all G.I. JOE Contacts.
Lost Keys (Bronze)	Gain access to a Heavy Class Ability door.
Lovers' Quarrel (Bronze)	Complete any mission using Baroness and Duke.
M.A.S.S. Destruction (Gold)	Destroy the M.A.S.S. Device.
Man Up (Bronze)	Complete a Jungle or Tundra mission without going Man Down.
Nimble Access (Bronze)	Gain access to a Commando Class Ability door.
Side Mission Completist (Bronze)	Complete all Sub-operation Missions.
Sloppy Joe (Bronze)	Achieve the worst rank on a level without going Man Down.
Storm Shattered (Silver)	Defeat Storm Shadow in all three secret arenas.
Strike Commander (Silver)	Defeat every wave in all Satellite Strike mini-games.
Strike Lieutenant (Bronze)	Defeat every wave in one Satellite Strike mini-game.
The Tables Have Turned (Bronze)	Complete any Arctic, Desert, or Jungle mission using any COBRA character.
Triplets (Bronze)	Pick up all three types of Point Multipliers in one mission.
Turret Syndrome (Bronze)	Operate the turret in every vehicle in the game.
Yo Joe! (Bronze)	Purchase two G.I. JOE contacts.