The Call of Duty series has earned a reputation for upping the ante with higher stakes and bigger set-piece moments. Modern Warfare 3 tackles quite possibly the biggest stage the franchise has seen so far: World War III. Is this the end of a trilogy? Sledgehammer Games general manager Glen Schofield says that Modern Warfare 3 leaves room for sequels (obviously), it won't leave unresolved tension like the last two games.

"The idea was that the other two were left on cliff-hangers," Schofield said. "Doing it again felt wrong."

"As a matter of fact, it was like, we just escalated this thing from the first game to the third game to World War Three. We could leave it hanging, or we could do an Iron Man and wrap it up. You feel good, you know. Is there a glimmer of something that says the series isn't done, if we wanted it that way?" Schofield told CVG. "Yeah, but not in terms of a cliff-hanger, more in terms of the universe has blown up, if that makes sense."

How long that story campaign will last, though, is still a mystery. The last game, in particular, was criticized for its short campaign time. Schofield shied away from questions of length, claiming that he's played every stage several times but has been doing it at every iteration. "We don't ever say 'Write a five hour story,' we just write a really great story, and at the end of the day if it comes out and it feels too short, we don't want to just add stuff," he said. "With that said, I don't think it's too short. It feels like a great story."