It's becoming increasingly difficult to find a publisher that isn't taking advantage of Vavle's digital distribution platform, Steam. Today, NCsoft said that it would lend its plethora of massively multiplayer online games to the Steam storefront. Beginning today, Steam users can now purchase a number of NCsoft's games and expansion packs for its City of Heroes, Guild Wars, and Lineage franchises.

NCsoft titles currently available through Steam include Guild Wars Game of the Year Edition, City of Heroes Architect Edition, Guild Wars Nightfall, Guild Wars Factions, Lineage, Lineage II: The Chaotic Throne, and Guild Wars Trilogy. The South Korean publisher also said that its upcoming angels-and-demons MMOG Aion: The Tower of Eternity will be available through the service when it launches in North America and Europe this fall.

To promote the new additions, Valve and NCsoft are offering a variety of deals on the recently added games in the coming weeks. As for current promotions, Lineage II: The Chaotic Throne is available for $9.99, which is 50 percent below its standard sticker price. Guild Wars: Game of the Year Edition has also been discounted, by 10 percent, for a limited period of time and is available for $26.99.