This Nazi Zombie slaying third-person shooter is a refreshing touch to a played out genre. There is a ton of co-operative fun to be had by sniping the undead enemies with the award-winning Sniper Elite X-Ray kill cam.
Did you play Sniper Elite from the last generation of consoles? It was ridiculously hard but very realistic. The game was lauded for its difficulty and authenticity to not only World War II Berlin but also the career of a sniper. One false move and your dead.