Ken McKown writes: When I reviewed the original Sniper Elite last year, I was shocked at how gruesomely fun it was. Sure, the stealth was broken, the graphics not so wonderful and plenty of other issues brought down the experience, but that x-ray kill cam and satisfying shooting mechanic drew me in. The team at Rebellion has returned with this PC-only expansion that features the most clichéd concept in gaming: zombies. They aren’t just regular, run of the mill zombies mind you. These are Nazi Zombies.