HalfLife2.net has noticed Interplay will becoming to Steam soon with an official announcement made here.

The Interplay Steam store page will be made available at this URL when Gabe wakes up in the morning.

(August 17th, 2009) - Interplay Entertainment (Interplay), the publisher of many video game hits, and Valve Corporation (Valve), a developer of leading-edge technologies and software, announced today an agreement to bring Interplay titles to customers worldwide via Steam®, Valve's leading platform for digital content distribution and management.

Beginning today, Interplay titles including Fallout, Sacrifice and Kingpin will become available for purchase via Steam, which makes PC games available online to more than 20 million users worldwide.