Classic Hulk
Collect 5 comic books.
Gray Hulk
Smash 7500 objects.
Maestro
Destroy a building in each neighborhood.
The Professor
Complete all jump challenges.
Ironclad
Defeat the U-Foes, trick a U-Foe into KOing their team mate, and defeat Abomination.
Abomination
Defeat Abomination.