I'm trying to earn the Guide One achievement.
The last one I need to complete is the
Cooperative Novice *Win 3 Cooperative games*
I have 2/3, but I don't remember how I got the 2.
I've tried 2v2 melee, 2v2 cooperative agains't ai, but neither has earned me "cooperative game" win. How do I get my last win?
I'm trying through 'custom games'