In a way, I'm not too surprised that
Call of Duty: Black Ops will have 4-player co-op. Developer Treyarch had that in their
Call of Duty : World at War so seeing it in the next Call of Duty game is not too out of the ordinary.
USA Today
has a preview of their time with the game and besides the admission of co-op in the Black Ops, you'll be taking part in the story of at least two main characters, a staple it seems after
Modern Warfare. Treyarch also had in a former Soviet special forces operative to help with the game.
New to the series will be a way to change the ammo type for your weapon. Demonstrated was a crossbow that fired a regular bolt as well as a one with an explosive tip. They also talk about riding in an SR-71 Blackbird, which has been retired since 1998.