Onslaught. Devastation. Invasion. Nemesis. + Extinction x4 The four DLC packs coming to Call of Duty Ghosts through 2014 will also include a four-part episodic adventure in the game's co-op players vs. aliens Extinction mode, as explained today in the new Season Pass trailer for Ghosts.
Extinction is the only good thing about Ghosts. I so hated the multiplayer. Traded in the game after 3 weeks. I don't snipe and I don't camp, and there are no good maps for run-and-gunners like me. Extinction was a ton of fun though. Better than zombies, imo.