Probably The Best Nothing You'll Spend This Month

There's gotta be some reason why Valve is giving away Portal for free.  Maybe they're testing some new servers or something, 'cause they're in for some traffic!  It's darn well nice of them to give such an acclaimed game away, as opposed to the usual way the industry clings onto popular IP like a hot, bacon mushroom cheeseburger, slowly sweeping crumbs to us off the side of the table, but savoring all of its meaty goodness for themselves.  Not this time!  Chef Newell serves up a heaping pile of First-Person-Puzzle goodness for all the internet-capable!  Yes, you!

Oh, and it's on PC and Mac, so there's no excuse; it's free and compatible!

Note: The deal ends on May 24.