Get ready for some more grisly, zombie-killing, survival action this fall. Another Zombie Apocalypse is fast on track, this time from developer Backbone Entertainment. Zombie Apocalypse 2 will feature the same four-player online/shared screen co-op, but is cranking gameplay depth up a notch - the characters will have more personality as well as class-like abilities, a more worthwhile plot will be conveyed using animated comic strips, and players will be able to upgrade their weapons and attributes.