Star wars Force unleashed. More than 15 gig atleast XD
age of conan 25gb beat that if you can
Mass Effect 2 - 14.6 Gb, thats just the setup size.
ubergeek mentioned above Age of Conan, just the client download is 27 frikkin GBs. This has to be the biggest, imo
also, WoW, with both the expansions and the huge number of addons, screenshots etc can easily grow to 25GB. Once the Cataclysm expansion comes along this year, it’ll probably overtake Conan.
GTA 4 is also huge, 15GB+, I think, not sure…
GRID downloaded through STEAM came over 11GB 
Been thru a hell downloading all that data…
yep age of conan at 26gb is the biggest i’ve played. and the game sucked as well.
i believe the force unleashed pc version also required something like 25-30gb hard disk space. did anyone play that?
COD MW2 -11gb