Unlockables.

Unlockable                        How to Unlock
Doomed (30 points)                Defeat Dr. Doom
Skrull's Demise (20 points)       Defeat Super Skrull
Elemental Master (20 points)      Defeat Terrax
Skrull Slayer (20 points)         Complete Skrull Lair Level
Cold War Relic (20 points)        Complete Red Ghost Level
Wedding Crasher (20 points)       Complete New York Level
Rock Crusher (20 points)          Complete Himalayas Level
Arctic Explorer (20 points)       Complete Military Base Level
Shanghai Surprise (20 points)     Complete Shanghai Level
Superhero (200 points)            Complete the game in Fantastic mode
Hero (160 points)                 Complete the game in regular mode
Thing (110 points)                Upgrade all of The Thing's Powers
Human Torch (110 points)          Upgrade all of the Human 
                                  Torch's Powers
Invisible Woman (110 points)      Upgrade all of the Invisible 
                                  Woman's Powers
Mr. Fantastic (110 points)        Upgrade all of Mr. Fantastic's Powers