Quote Originally Posted by Lemur View Post
Games bought through Steam cannot be resold. The Steam Subscriber Agreement denies users the right to "sell, charge others for the right to use or otherwise transfer [an] account"; Valve disables any accounts that they believe to have been sold or transferred. Furthermore, retail purchases which have already been tied to a Steam account will not be transferred to another if the receipt presented to Valve as proof of purchase is from an "online auction website or used software vendor". This prevents players from swapping, re-selling or borrowing Steam titles.
Pfff, what are they gonna do? Send Gordon Freeman around to break my legs?