ame Informer Online just grabbed some exclusive news on Half-Life 2: Episode 1 (Formerly known as Aftermath). The highly anticipated expansion will now be released on May 31st (it slipped from the April 20th date) via Valve’s Steam distribution, for only $19.99.

We recently spoke with Valve’s Gabe Newell about the release, and he claimed that it took him about seven hours to play through Episode 1. We have a full interview from GDC which you can read right here.