The only new area is unlocked after completing all the current assassination jobs on the Kill Board. The rest of the side-missions are return trips to areas BJ has already explored in the main game. It takes a long while to complete all these extra tasks, but there is a strange reward at the end of the road - a totally new mission, with a unique location you won’t find anywhere else. There are tons of side-missions to unlock with Enigma Codes, assassinations, hunts for contraptions you’re missing, and even a few small requests from your fellow rebels. Even after finishing the main story, there’s more you can do in Wolfenstein 2: The New Colossus.