Marvel Super Hero Squad: The Infinity Gauntlet

Story based achievement: Beat the Gamesmaster's challenge, then beat the Gamesmaster's maze and finally beat the Soul Stone machine. While Wolverine destroys the enemy producing paintings in the back, Iron Man needs to hack the three terminals on the front of the machine. This is all while fending off Iron Man/Wolverine clones. Kinda a pain, but doable if you work fast.