If you've been looking to give XCOM: Enemy Unknown a shot, but aren't willing to pony up the cash, you can play it for free this weekend on Steam.
Valve's digital marketplace is running "2K Games Weekend," which also offers a number of the publisher's other games at deeply discounted prices. Want to pick up the BioShock games on the cheap? Still haven't played Borderlands?
Head on over to the Steam Store right here to check out all of the current deals.