This mission specifically comes after two “post-game” missions, one of which requires you to dig at your base, and the other to rescue a survivor.Īfter which you will be directed to enter the Skill Trainer to look at your four new Subclass choices. After completing the Main Story, you will get a mission to scavenge another Memory Board. Somewhat disappointingly, it requires completing the entire Single Player story to get to the point of unlocking them. The first thing to do with Subclasses is obviously how to unlock them.