Speaking to Eurogamer, Bungie PR boss Brian Jarrard has confirmed that Halo 3 Recon isn't a full game, as many had hoped yesterday.
"It's hard to put a number on it," he said when asked how long the campaign would be.
"It's going to represent hours of new campaign gameplay, but it's not a full, entire game like Halo 3. I think we have a lot of value on the disc."
Developer Luke Smith added that Recon was essentially fan service.
"This project is one that we just had to do," he said. "It's a project that is for our fans. Just like pretty much everything we do at Bungie, it's always about how we can serve our fans best."
More through there. Recon's out next year.