I bought doom 3...how many computers can i use the serial key with?

i was just wondering if i can put it on 2 computers and play them both online at the same time

I bought doom 3...how many computers can i use the serial key with?triumph

as many as u want but dont go online with it, otherwise it will crash

I bought doom 3...how many computers can i use the serial key with?worms

I have tried this with warcraft 3, it will work with as many computers, but when you start it up with one just take out the disc and put it in the next machine. Taking the disc out during gameplay wont effect anything, because the game is installed to the hard drive, but like a x-box does not install the whole game, it just plays it off of the disc. Also try something called Daemon Tools it will let you boot up the game without the disc, but i dont think you would want to go online in the game.