Complete the indicated tasks to unlock the following suits. Story mode missions will unlock One Man Army missions. One Man Army missions will unlock specific suits for the One Man Army missions.

Unlockable	How to Unlock
Classic Mark I suit	One Man Army Mission 4 (vs. AIM), which is unlocked after Story mode mission 8 (Lost Destroyer).
Classic suit	One Man Army mission 3 (vs. Mercs), which is unlocked after Story mode mission 7 (Arctic Battle).
Extremis suit	One Man Army mission 2 (vs. Maggia), which is unlocked after Story mode mission 4 (Maggia Factories).
Hulkbuster suit	One Man Army 5 (vs. AIM-X).
Mark II suit	One Man Army mission 1 (vs. Ten Rings), which is unlocked after Story mode mission 3 (Stark Weapons).

Completion of Story mode unlocks all suits for replay of Story and Mission Archives in any game mode. Suits different from normal Mark 3 have fixed equipment that can be upgraded, but does not change weaponry or armor.

Successfully complete the game to unlock the Silver Centurion suits. The Ultimate suit is the equivalent of the Extremis but does not have stealth has a more powerful Unibeam and Gatling Repulsors that are weaker but acceptable.