User blog comment:Callofduty4/Why is it a sin for Treyarch to rip some aspects off of Infinity Ward but OK for Infinity Ward to rip off some stuff from Treyarch?/@comment-1401067-20091225123514

Special Ops is pretty much a rip-off of Nazi Zombies. Infinity Ward raised the highest multiplayer level from 65 to 70 as Treyarch raised it from 55 to 65.