Microsoft and 343 promised more Halo 10th anniversary festivities at this year's PAX Prime, and now we're seeing just what they meant. The official site announced today that the Seattle gaming event will host its own Halo event inside it, like a Russian nesting doll. Called "Halo Fest," it will be at the Annex 3rd Floor of the Washington Convention Center during PAX Prime, running alongside the days and times of the regular PAX event.

The announcement promises "tournaments, exclusive panels, and sweet prizes" for Halo fans. It's in honor of the 10th anniversary event this year, which has already included an update to Waypoint, a new motion comic, and new Halo Avatar duds. We've also heard rumblings of a Halo: Combat Evolved remake serving as 343's debut project.

Admission is included with the PAX Prime badge purchase, but since the announcement doesn't specify any way to gain admission without a PAX badge, it's probably safest to assume there won't be. And speaking of badges, PAX organizers tweeted that 3-day passes were only expected to last another 15 days -- and that was almost a week ago. This announcement might speed up purchases a bit, so if you want in you should probably grab your credit card toot sweet.