Hi, the game can only be installed online with "Steam" (Even if, like me, just want to play offline). The key will be registered there! Is he once registered, it can be used a second time! I tried on Steam to let delete the old registration, you must create an additional support account, with many obstacles, and then not delete the yet !!!! ! Quite lousy tour. If few people would point to the Enlarged cover visible in this case, but this is not a time in the small print. Now I have bought the game, created 2 accounts there, and can not install it once!