Duke and Scarlett classic costumes
     Enter  these  codes  at the main menu (with the New Game and Load
Game options):

[Left], [Up], [X], [Up], [Right], [Y]:  Classic Duke

[Right], [Up], [Down], [Down], [Y]:     Classic Scarlett



Achievements
     Complete each achievement to get the allotted gamerscore.

Acceleration 
Celebration (10):             Activate the Accelerator Suit three times 
                              in any mission (P1 only)

Accomplished Mission (25):    Gain the highest Mission Ranking (P1 only)

All G.I. JOE Contacts (50):   Purchase all G.I. JOE contacts (P1 only)

Arctic Completed (50):        Complete all Arctic missions (P1 only)

Arishikage Attack (10):       Complete any mission using Snake Eyes 
                              and Storm Shadow

Baroness (25):                Defeat Baroness (P1 only)

Battle Master (75):           Collect and spend all 130 possible 
                              Battle Points (P1 only)

Bevvy o' Heavy (10):          Complete a mission using only Heavy class 
                              characters (P1 only)

Classified (25):              Collect all Intel Cards (P1 only)

COBRAAAA!!! (25):             Purchase all COBRA characters

Code Cracker (10):            Gain access to a Combat Soldier Class 
                              Ability door (P1 only)

Combat Rock (10):             Complete a mission using only Combat class 
                              characters (P1 only)

Desert Completed (50):        Complete all Desert missions (P1 only)

Destro (25):                  Defeat Destro (P1 only)

Double Barrel Roll (10):      Perform 10 barrel rolls in unison 
                              in any level in co-op (P1 only)

File-o-phile (35):            Collect all File Cards (P1 only)

Firefly (25):                 Defeat Firefly (P1 only)

Gimme The Keys (10):          Drive every G.I. JOE vehicle 
                              in the game (P1 only)

Girls Night Out (10):         Complete any mission using female 
                              characters only (P1 only)

Go Commando (10):             Complete a mission using only Commando 
                              class characters (P1 only)

Hack 'n Slash (20):           Finish a level using only melee attacks 
                              on ground troops (P1 only)

Half the Battle (10):         Collect 50% of all File Cards (P1 only)

Hardcore G.I. JOE (50):       Complete every Mission on Hardcore 
                              Difficulty (P1 only)

Higher Score (10):            Replay a mission and earn a higher score 
                              (P1 only)

It Takes Two (10):            Complete any mission in 2 player co-op 
                              (P1 only)

Jungle Completed (50):        Complete all Jungle missions (P1 only)

Launch Money (10):            Launch 50 enemies into the air 
                              and kill them (P1 only)

Lost & Found (25):            Collect all G.I. JOE Contacts (P1 only)

Lost Keys (10):               Gain access to a Heavy Class Ability 
                              door (P1 only)

Lovers' Quarrel (10):         Complete any mission using Baroness and Duke

M.A.S.S. Destruction (50):    Destroy the M.A.S.S. Device (P1 only)

Man Up (20):                  Complete a Jungle or Tundra mission 
                              without going Man Down (P1 only)

Nimble Access (10):           Gain access to a Commando Class Ability 
                              door (P1 only)

No "I" in Team (20):          Complete mission with higher than 50% Dual 
                              Targeting kills (P1 only)

Side Mission Completist (20): Complete all Sub-operation Missions

Sloppy Joe (10):              Achieve the worst rank on a level 
                              without going Man Down (P1 only)

Storm Shattered (25):         Defeat Storm Shadow in all three secret 
                              arenas (P1 only)

Strike Commander (50):        Defeat every wave in all Satellite Strike 
                              mini-games (P1 only)

Strike Lieutenant (25):       Defeat every wave in one Satellite Strike 
                              mini-game (P1 only)

The Tables Have Turned (10):  Complete any Arctic, Desert, or Jungle 
                              mission using any COBRA character

Triplets (25):                Pick up all three types of Point 
                              Multipliers in one mission (P1 only)

Turret Syndrome (20):         Operate the turret in every vehicle 
                              in the game (P1 only)

Yo Joe! (10):                 Purchase two G.I. JOE contacts (P1 only)