PSA: Portal Free on Steam Until May 24th

In case you haven't heard, Steam has been released for Mac and to celebrate the occasion Valve is offering Portal for free until May 24th. For both Mac and PC. If you haven't yet played the sublime experience that is Portal then trust me, you'll love it. If you have played the game but don't own it then why are you even still reading this? Run, don't walk, to the Steam website and get Portal now!

Via Kotaku