Everyone's favorite Portal song, Still Alive, will be available for free tomorrow for Rock Band players. No, this is not a April Fools Day joke. Harmonnix, MTV Games, and Valve have teamed up to make this possible for Xbox 360 and Playstation users.

"While the cake may be a lie, the free download of "Still Alive" is confirmed truth," said Greg LoPiccolo, VP of product development at Harmonix. "'Still Alive' is an awesome song that brings together great gaming and great music. We've teamed up with Valve to deliver a free download of "Still Alive" as a "thank you" to our fans for their incredible support."

"Rock Band has lit the industry on fire by opening a new market for cooperative musical gaming," said Doug Lombardi, VP of marketing at Valve. "We're delighted Harmonix has selected the track for inclusion in the growing library of tracks available for this phenomenal title."