30 Bronze
10 Silver
3 Gold
1 Platinum

Bronze

Baroness
Defeat Baroness.

Destro
Defeat Destro.

Firefly
Defeat Firefly.

Strike Lieutenant
Defeat every wave in one Satellite Strike mini-game.

Hack 'n Slash
Finish a level using only melee attacks on ground troops.

Sloppy Joe
Achieve the worst rank on a level without going Man Down.

Man Up
Complete a Jungle or Tundra mission without going Man Down.

Half the Battle
Collect 50% of all File Cards.

Bronze
Collect all File Cards.

Classified
Collect all Intel Cards.

Lost & Found
Collect all GI JOE Contacts.

Triplets
Pick up all thee types of Point Multipliers in one mission.

Arctic Completed
Complete all Arctic missions.

Yo Joe!
Purchase two GI JOE contacts.

Combat Rock
Complete a mission using only Combat class characters.

Go Commando
Complete a mission using only Commando class characters.

Bevvy o' Heavy
Complete a mission using only Heavy class characters.

The Tables Have Turned
Complete any Arctic, Desert, or Jungle mission using any COBRA character.

Lovers' Quarrel
Complete any mission using Baroness and Duke.

Arishikage Attack
Complete any mission using Snake Eyes and Storm Shadow.

Girls Night Out
Complete any mission using female chracters only.

Gimme The Keys
Drive every GI JOE vehicle in the game.

Code Cracker
Gain access to a Combat Soldier Class Ability door.

Nimble Access
Gain access to a Commando Class Ability door.

Lost Keys
Gain access to a Heavy Class Ability door.

Turret Syndrome
Operate the turret in every vehicle in the game.

Double Barrel Roll
Perform 10 barrel rolls in unison on any level in co-op.

Higher Score
Replay a mission and earn a higher score.

It Takes Two
Complete any mission in 2 player co-op.

Side Mission Completist
Complete all Sub-operation Missions.

Silver

Launch Money
Launch 50 enemies into the air and kill them.

Storm Shattered
Defeat Storm Shadow in all three secret arenas.

Strike Commander
Defeat every wave in all Satellite Strike mini-games.

Battle Master
Collect and spend all 130 possible Battle Points.

No "I" in Team
Complete mission with higher than 50% Dual Targeting kills.

Desert Completed
Complete all Desert missions.

Jungle Completed
Complete all Jungle missions.

Hardcore GI JOE
Complete every Mission on Hardcore Difficulty.

Acceleration Celebration
Activate the Accelerator Suit three times in any mission.

Accomplished Mission
Gain the highest Mission Ranking.

Gold

M.A.S.S. Destruction
Destroy the M.A.S.S. Device.

COBRAAAA!!!
Purchase all COBRA characters.

All GI JOE Contacts
Purchase all GI JOE Contacts.

Platinum

GI JOE:
GI JOE.

Source: http://www.ps3trophies.co.uk/showthread.php?p=225676