You knew it was coming. Halo 2 and Halo 3 successfully doubled the available maps for multiplayer, and the Halo prequel game Reach will add three new maps for Multiplayer (including Invasion) on November 30, 2010. It’ll set you back 800 MS points ($10) and also add 250 gamerscore points.

And to reveal these, Bungie has packed an excellent trailer. No just because it has some amazing gameplay footage on the new maps, but it also has a fantastic new variation of the classic Halo theme with all the action. Seriously, the music is great, and composer Marty O’Donnell knows it, so expect to see an MP3 available on soon.