Wow that is a lot of games you are playing. I can only stick to one, sometimes two. I am currently wrapping up Mass Effect Trilogy on PS4 with some games of Back 4 Blood every now and then. 

Was it only on GamePass for a very short time?

Some of the special infected are really hard too. The one that traps you in that cocoon-like thing. That can wipe out a whole team if not killed immediately. Atleast from my experience.