Unlock the following artwork by performing the corresponding tasks:

Stage Art
ARTWORK - HOW TO UNLOCK
Asgard - Complete Arcade mode eight times.
Danger Room - Complete Arcade mode.
Demon Village - Complete Arcade mode four times.
Fate of the Earth - Complete Arcade mode ten times.
Hand Hideout - Complete Arcade mode six times.
Kattlelox Island - Complete Arcade mode five times.
Metro City - Complete Arcade mode three times.
S.H.I.E.L.D Helicarrier - Complete Arcade mode seven times.
The Daily Bugle - Complete Arcade mode two times.
Tricell Laboratory - Complete Arcade mode nine times.

Character Art
ARTWORK - HOW TO UNLOCK
Character 3-D model - Land the last hit on Galactus with a given character.
Character Bio - Land the last hit on Galactus with a given character.
Character Ending - Land the last hit on Galactus with a given character.
First Piece of Character Art - Complete mission mode assignment with a given character.
Second Piece of Character Art - Land the last hit on Galactus with a given character.
Special 3-D model - Complete Arcade mode with every character.
Special Bio - Complete Arcade mode with every character.
Special Ending - Lose the final stage of Arcade mode.
Third Piece of Character Art - Land the last hit on Galactus with a given character.