Originally Posted by natureismassive
how did you manage to use the same key over and over again? i have a downloaded copy of the game. i opened up a second account on my pc - started the game. it asked for a serial - i put in the one the game came with and voila the game started. then it asked me to log in to a gamertag which i then created on xbox.com. but: then it asked me again for a serial but mine is wrong... any idea what i could do? thanks!
There are two different serial numbers. The game activation serial, which you put in the first time when it dials up the publisher's servers and the live activation code for assigning it to your gamertag. If you bought through digital download, you can find the keys under the game in the GFWL client.