Iron Man Unlockables
Suit Unlockables
Mark III - Unlocked by Default
Mark II - Beat the "One Man Army vs. Ten Rings" Challenge
Classic - Beat the "One Man Army vs. Mercs" Challenge
Classic Mark I - Beat the "One Man Army vs. AIM" Challenge
Extremis - Beat the "One Man Army vs. Maggia" Challenge
Hulkbuster - Beat the "One Man Army vs. AIM-X" Challenge
Silver Centurion (Xbox 360 Exclusive) - Beat the Mission "Showdown" (or beat the game, since "Showdown" is the last mission)
Ultimate Suit - Beat story mode (PS3 Exclusive)
Submitted By: Sidney C. Pasamonte