i'll say 4 million thru the rest of the year. sure fire to be highest selling 360 game.

Famitsu Weekly - 10/9/9/9
http://www.famitsu.com/sp/070914_halo3/
Press Start Online - 10
http://www.pressstartonline.co.uk/view/287
Official XBox Magazine (Australia) - 10
Toronto Sun - 4.5/5
TeamXBox - 9.7
http://reviews.teamxbox.com/xbox-360/1387/Halo-3/p1/
IGN - 9.5
http://xbox360.ign.com/articles/821/821911p1.html
IGN UK - 9.5
http://uk.xbox360.ign.com/articles/822/822427p1.html
GameSpot - 9.5
http://www.gamespot.com/xbox360/acti...om_clk=topslot
GameSpot Korea - 9.7
http://www.gamespot.co.kr/xbox360/re...091082p,00.htm
GameSpy - 5/5
http://xbox360.gamespy.com/xbox-360/.../821976p1.html
Gamers Daily - 10
http://www.youtube.com/watch?v=SaOt2RhiOpY
http://www.gamersdaily.us/
Game Reactor - 10
http://www.gamereactor.dk/anmeldelser/66804/Halo+3/
Game Trailers - 9.8
http://www.gametrailers.com/player/25484.html
Xbox Life - 9.4
http://www.xboxlife.dk/
GamePro - 5/5
http://gamepro.com/microsoft/xbox360...s/135749.shtml
1UP - 10
http://www.1up.com/do/reviewPage?cId=3163125
Euro Gamer - 10
http://www.eurogamer.net/article.php?article_id=83948
CVG - 9.7
http://www.computerandvideogames.com....php?id=172449
Games Radar - 10
http://www.gamesradar.com/us/xbox360...00000000000350
Pro-G - 10
http://www.pro-g.co.uk/xbox360/halo_3/review.html
Gamer 2.0 - 8.8
http://www.gamer20.com/gamehub/halo-3-x360/review/1081
Worth Playing - 9.6
http://www.worthplaying.com/article....thread&order=0
Gamer Node - 9.5
http://www.gamernode.com/Reviews/4346-Halo-3/index.html
Game Daily - 4.5/5
http://www.gamedaily.com/games/halo-...tem/5186/1768/
Kikizo Games - 9
http://games.kikizo.com/reviews/xbox360/halo3_p1.asp
Yahoo Games - 4.5/5
http://www.gamerankings.com/itemrank...eviewid=809547
Game Informer - 9.75
Firing Squad - 9.2
http://www.firingsquad.com/games/hal...view/page8.asp
Cheat Code Central - 4.9/5
http://cheatcc.com/xbox360/rev/halo3review.html
ActionTrip - 9.2
http://www.actiontrip.com/reviews/360/halo3.phtml
PALGN - 9.0
http://palgn.com.au/article.php?id=8...e14e75 c8c4b9
Daily Game - 8.8
http://www.dailygame.net/news/archives/006632.php
AtomicGamer - 9.5
http://www.atomicgamer.com/article.php?id=470
GameTap - 10
http://www.gametap.com/home/read/art...15298e5d0607fa
MS Xbox World - 9.5
http://www.msxbox-world.com/xbox360/...36/Halo-3.html
WHAM! Gaming - 4.5/5
http://wham.canoe.ca/360/2007/09/19/4508982.html

1.5 is reasonable.

HALO is the KA for x360.(maybe the real only one)

but

with this chapter i think the series exhausts... 

 it's time for a new IP for bungie...

I think Halo 3 can pull 3 million on the first week.

 Is that a joke?  They have 1.5 million in PREORDERS alone. 

There are two Halo spinoffs in the works and many other great games coming to the 360 so this is hardly the end of the line for the 360.  I mean it'll have 2 exclusive episodes for Grand Theft Auto 4, Banjo Kazooie 3, Resident Evil 5, Mass Effect 2-3, Too Human Trilogy, Lost Odyssey, Splinter Cell: Conviction, Alan Wake, Fable 2, Marvel Universe MMO, Universe At War, Halo Wars, Ninja Gaiden 2, Infinite Undiscovery, Gears of War 2, and *many* other great games, hell I'll go on record to say that 2008 is shaping up to have an even stronger lineup than 2007... It just seems to keep getting better year after year...

3 mill first week sounds about right

A few statistics from Bungie.net, as of 8:30am:

52,000+ Halo3 players online at the moment
394,000 Unique Halo 3 Players in the last 24hrs
1,057,000 Matches logged in the last 24hrs
86,000,000 USNC kills in online campaign mode

2 million by first week.

4 million by the end of the year. 

 Updated for Duke City's Q-T3CH ... here's for more coverage: http://blogs.abqtrib.com/albq/gamers/2007/09/halo_3_coverage.html