Steam's giving away free copies of L4D2, but only for a limited amount of time! The giveaway ends at 10AM PST on 12/26. AKA you have ~13 more hours since this post. To get your free copy, just boot up steam, go to the store page, type "Left 4 Dead 2" in the search box and navigate to the game's page. Click the install button and Steam will register a copy of the game to your account for future use. Edit: Ops, just noticed Itherael's thread. Still -- more awareness, right?