Halo Fest, as relayed by Major Nelson, have revealed three new multiplayer maps for the upcoming Halo: Combat Evolved Anniversary. The highlight of the bunch is probably Timberland, the pine-studded arena from the PC version of Halo (original version pictured), suitable for 8 to 16 players. Next up is Prisoner, a symmetrical map with bridges designed for 2-8 players.
Finally, a new Firefight map has been announced. Titled Installation 04, the map is based on the level "Halo" from the original game, which you might remember as the first level in which Master Chief set foot on the ring world (after crash landing).
Update: We also learned of a neat new feature of the additional Firefight map while perusing Halo Fest: While you hold off the hordes of Covenant, you'll be aided by AI-controlled Marines, further simulating the level from the original game. Just don't, you know, kill them, or else you'll lose valuable points, and also probably fractions of your soul, because that's murder.