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Iron Man and Silver Surfer are unlockable stikers in this game. To unlock them, you need to go to the S.H.I.E.L.D. simulator and play each of the four minigames 11 times. After that, a "Complete" message will appear in place of the number of times you have played that game. To unlock Iron Man, complete three minigames, and complete the other one to unlock Silver Surfer(a "Character Unlocked" Message will appear). You can then use them in any mission.
| Unlockable: | How |
| Iron Man | Complete 3 of 4 minigames |
| Silver Surfer | Complete all 4 minigames |
| Unlockable | How to Unlock |
|---|
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