Resounding mediocrity.... 3/5. It's like Learn to Fly, but facing the opposite direction and without any ability to control yourself. Could be better, could be worse.
Well, One: It's called Ultimate Assassin. An Ultimate Assassin is able to infiltrate, kill the target, and slip out unnoticed. This isn't the MGS style of sneaking where you run around with an smg. The Gaurds are a bit dense though, as I beat several levels by running through a crowd of gaurds and into a closet, and then they forget where I went as soon as I left their sight. On the last level, I ran past a gaurd, stabbed the dude, and jumped behind a crate, went invis, and the gaurd just walked away.
This is one of the worst zombie games I've ever played. It's incredibly dull, no excitement, and I've been standing in place in survival mode for about 3 minutes now with no zombies in sight. 1/5 fail.