diablo 2 was a gig for the full install... imagine if there were two settings, the 1st and 3rd person options. everything in the third person would have to be fully 3-dimensional, for when you switch to first person you will be able to scope the city out on a ground level instead of a birds eye view. or you can have two completely different setups, one fully 3d for 1st person, and one similar to diablo as it is now. if its a gig for the 2d stuff, imagine how big the game would be with the 2d and 3d... i think you're looking at a 6 cd set...