Harmonix developer Sean “hmxsean” Baptiste today announced on the company’s official forums that all Rock Band owners will soon receive free DLC in the form of Portal’s hit ending theme song, “Still Alive.”

The song is scheduled to hit the Xbox Live Marketplace tomorrow — on April Fools day no less. PlayStation 3 owners of Rock Band will have to wait until April 17, due to the fact that the PlayStation Store is currently undergoing a revamp.

LC April 1st! Huge success! [Harmonix]

Read more: New Motley Crue Single Hits Rock Band This Week, Iron Man Demo Hits Xbox Live Tomorrow, First Full Album Hits Rock Band Next Week, Muse Returns To Guitar Hero In New DLC Pack On May 8, “The Cars” Album Hits Rock Band Next Week