Iron Man - Cheat (PS3, X360)

Unlockable: Suits
To unlock the following suits for Iron Man to use, complete the requirement listed.

Classic - Complete the challenge “One Man Army vs. Mercs”
Classic Mark I - Complete the challenge “One Man Army vs. AIM”
Classic Mark II - Complete the challenge “One Man Army vs. Ten Rings”
Classic Mark III - Automatically unlocked
Extremis - Complete the challenge “One Man Army vs. Maggia”
Hulkbuster - Complete the challenge “One Man Army vs. AIM-X”
Ultimate - Complete Story Mode in its entirety