The game delivery service will be getting games from Epic's catalogue of big-name releases, reveal this afternoon.

Valve promise us that several PC games are available to purchase and download as of now, Epic no doubt pleased to have access to Steam's 15 million members.

Unreal Gold, Unreal II: The Awakening and the Unreal Tournament series of games are all on offer, as well as the recently released Unreal Tournament 3. An Unreal Deal Pack, bundling all the games, will be available for 59.95 USD.

Celebrating the new launch, Epic's games will also carry an individual 10% discount.

"Epic is a leading developer of game engine technology and has produced some of my favorite games of all time," enthused boss Gabe Newell. "It's an honor to be working with them and offering their current and classic titles to the millions of Steam gamers around the world."

"Steam is a revolutionary technology that opens up an entirely new way to put our games into the hands of millions of PC gamers around the world," added Jay Wilbur, vice president of Epic. "Valve has changed the face of digital distribution for game developers, publishers and consumers, and we are thrilled to be a part of the Steam community."

By Luke Guttridge