If I buy sins as digital download, can I download and install it on two computers? My brother would like to play as well. Now I'm aware that we probably can't both play online at the same time, but what about Single Player / LAN Multiplayer?
Also how exacatly does the installation work, does it come with a client like steam, which always runs in the background? And I assume I can redownload the game whenever I want in case I reformat my HDD or something. Could I also make a backup to CD / DVD?