"Eidos is delighted to add Steam to our extensive digital distribution network. Steam represents an opportunity to distribute our games electronically to millions of gamers around the world," said Eidos New Media business development manager Tom Marx. "It also provides us a direct connection to these extremely active PC influencers who frequent Steam as a source for new content and information. As a result of being a spotlight feature on Steam this year, we expect to see sales of Tomb Raider: Anniversary benefit across all channels."

Eidos is just one of numerous publishers and developers to announce its support for Steam recently. In the last several months, companies such as Activision, Majesco, 2K Games, Funcom, and Unknown Worlds have made games available through Valve's service.

At time of writing, pricing information for the Eidos titles was not yet available on Steam or on steamgames.com.

Update: Eidos' games have been added to Steam. Most games are currently divided into two pricing tiers, $17.95 and $35.95. Games priced at $17.95 include Commandos: Behind Enemy Lines, Commandos: Beyond the Call of Duty, Commandos 2: Men of Courage, Commandos 3: Destination Berlin, Hitman: Codename 47, and Hitman: Silent Assassin. Games priced at $35.95 include Battlestations: Midway, Just Cause, and Hitman: Blood Money. Finally, Commandos: Strike Force is available for $26.95.