I have purchased every COD game that has zombies and I have never played campaign or multiplayer, strictly zombies. I like that you can sit down and play a game and then just put it down. It doesn't suck me in the same way other games do which is part of why I like it.

The newer Black Ops 3 has really come a long way with the Zombies games. There is now a weapon XP system with upgrades and customization and they are getting really detailed with the maps making them have tons of replay value.

I play on PC and I mostly play BO2 and BO3. I usually play solo as I don't have any competent zombie friends. Add me on steam and send me a msg saying you saw me on 2p2 if anyone wants to kill some zombies! https://steamcommunity.com/profiles/76561198014575328/