its fun,my daughter and i played it we got to the 15th wave
http://www.ninjakiwi.com/Games/Action/Play/SAS-Zombie-Assault-2.html

http://www.ninjakiwi.com/Games/Action/Play/SAS-Zombie-Assault-2.html

I take it you dont own a copy of Call of duty world at war....
I said that because it has a zombie mini game like the one you posted. Its almost the exact same thing. Trust me, you would enjoy it. Get a used xbox 360. I think they are only about 150.