Board Thread:Questions and Answers/@comment-141.237.253.122-20131221104057/@comment-168.82.56.101-20140131213454

Gamer68 wrote: He's bad at first ( I think in MK1, 2, 3, 4 and DA.) but then he turns good (in MK:D). But I'm not sure, he could have turned good sooner, or maybe even later.

You are right. Kenshi "freed" him from Kahn control in MKDA, and in MKD he met Liu's Spirit who somewhat convinced him to be good.

Also, after the events of MK 2011, it is highly probable that Ermac has been freed, and will return back to his Edenian roots.