Around 2.5 million people have snapped up Halo 3: ODST in the two weeks since it was released.
That's according to USA Today, which also reports the expansion pack has generated over $125 million in sales and brought the total number of Halo games sold to 27 million.
But what about the rest of the Halo franchise? Any sign of that movie? "We're being very careful to pick the right time and the right partner," said creative director Frank O'Connor. No, then.
However, that doesn't mean we've seen the last of Master Chief. "I think that [his] fate, Cortana's fate and the identity of [SPOILER - read the article if you really want to know] are probably big mysteries that would be irritating if they were just cliffhangers," said O'Connor.
"We do have a plan that goes out at least six years. Eventually, it will become very apparent that there is a plan for the way the canon all ties together and the way the comic books and the novels all tie together."