While I believe zombies have been done to death (or undeath) I do like the idea of a group of gamers, who team up on the weekends to play their favorite shooter, (Zombie Death Kill) who now must use those very skills in order to save the day.
(In case you’re wondering, the lead character’s uncle is a ‘prepper’ and he allows the lead and his friends to use his fallout shelter as a clubhouse. As a result, they are not affected by whatever it was that turned much of the populous into zombies)