Halo 2 E3 Video Unleashed (bungie.net) On August 8, 2002 Bungie broke the vow of silence and officially announced to the world that we were indeed working on a sequel to Halo.

Then in September of last year, the Halo 2 announce trailer (if you haven't seen it yet, stop what you're doing and get up to speed!) was released giving the first glimpse of Master Chief as he embarked on his most critical mission yet - protect Earth from the Covenant threat! Thanks to TweakHound :)