User blog comment:Donotdiddlekids/Hahahaha.... Ghosts./@comment-1913529-20141101044104

Extinction was actually more challenging, because first off, you actually have an objective to complete, rather than having to survive infinite rounds of zombies, the Cryptids are smarter and attack from more angles than any number of zombies could, the challenges you have to complete each Hive gives extra skill points which otherwise you won't do well without your upgrades, especially your class upgrades, which zombies doesn't have, also there is different ammo types, and additional upgrades from the Cryptid armory. So you're wrong about the Extinction part, although zombies are classic, Extinction is better than zombies in many ways you cannot comprehend because of your tunnel vision