well, i'm quite surprized that noone mentioned Fonline (Fallout Online, Fonline: 2238) which is pretty much, Fallout 2 made mmorpg through a mod. so yes, that means more then just 2 or 16 of your friends can play at once with eachother, you can PvP, craft, take control of towns, and make factions. or hang in around towns, the map is a alright size, being the span of Fallout 1 and 2 put together, with most of all the locations still on map aswell (no tribal village sorry) From Klamath, to the Glow, NPC factions, BoS, Vault city, Enclave, and Raiders. and well, im rambling on here, but its very well made and still growing. and as i speak my friends are decussing ways take out PKs around San Fran and such. its a great game in my opinion with lots of Potential. so if a group of modders made something like that, why would making Fallout 3 something for at least a 2 player mod be so wrong?