Bungie has revealed that Halo: Reach will be a first-person shooter and launch in autumn 2010.
Reach likely refers to Halo novel The Fall of Reach, which acts as a prequel to the famous trilogy. The story tracks the brutal Covenant attack on the last of Earth's defence outposts, planet Reach.
And the war goes badly for us humans until the aliens stumble on a top-secret training facility for bio-engineered and technically augmented super-soldiers codenamed Spartans. A handful of them will be the last hope of humanity, and at least one - Master Chief - will survive and go on to make history.
Incidentally, those who pre-order Halo 3: ODST - due 22nd September - will get access to the Halo: Reach beta, whenever that starts.