User blog comment:Donotdiddlekids/Hahahaha.... Ghosts./@comment-24001421-20141031203856

"3. Extinction was TOO much like Zombies. Points, survival, hordes of enemies, etc."

well, aside from points it wasnt really like zombies. also, it wasnt a survival mode, it was a mission mode; not counting chaos mode but that is a remake of special ops chaos.