HAhahahahha, which fewl thinks CS or HL2 will outsell Halo2!? They truely don't own an xbox, and are king of fools among fools!
And Wil50n it probably can load custom maps. I've downloaded extra maps for Halo 2 for my Xbox, I'm sure it will probably use a similar map editor for HL2 Xbox (if not the same one), and probably the same format systems knowing valve, lazy buggers.
The file formats and such would most definately be identical to the current PC version - there's nothing lazy about not changing them - why would devs create more work for themselves? HL2 on Xbox would just be a straight port of the PC levels, models, textures and so on, scaling the art assets if necessary to maintain framerate.
As for custom maps, maybe there would be a means for Valve to supply new content - ie a maps directory on the Xbox hdd - and if so, it'd probably be possible for new HL2 Xbox maps to be created and compiled on a PC then copied over to the Xbox (even if Valve don't supply the in's and out's of how to do it, some clued-up punter would doubtless find out). What's for sure is that there wouldn't be a means of creating new maps on the Xbox itself.
As Reno suggests, HL2 Xbox wouldn't be shipped with either CS:S or DoD (too good an opportunity to release as standalone games and make more $$$).
im just going to be stubborn and say hl2 should remain on the pc (though i agree completely with what some of the arguments about money that people have put across)
