Iron Man 2
51 Achievements
12-15h
PS3
Bipolar
Shut down the GREENGRID power transmitter as both Iron Man and War Machine.
5.3%
How to unlock the Bipolar achievement in Iron Man 2 - Definitive Guide
For this achievement you need to beat the 7th mission 2 times: once as iron man, and once as war machine. DIFFICULTY DOES NOT MATTER.
Load the level back up after completing it for the first time but this time pick War Machine. (You select him in the Headquarters) As soon as you beat the level with War Machine the trophy will pop up.