Attention Halo fans: if you’re really, really serious about your gaming, then you’re going to want to mark your calendars right now for September 21 when Bungie, the design studio responsible for creating the Halo universe celebrate the launch of the newest game in the popular series with a party at EMPSFM, a neat fit of venue/theme for the game set in a future Earth.

The launch party is totally free and open to the public, so long as the public is at least 17 or in the company of a parent or guardian. The party kicks off at 6 pm and runs through 11 pm, and features a “Halo 3: ODST” Firefight tourney, panels and signings featuring “Halo” creators, and free access to the Science Fiction Museum and Hall of Fame. The first 200 people to show up will get a free t-shirt. Zealous fans who show up in a Halo themed costume get a chance to win prizes for their creative attire.