Valve's PC gaming download service Steam continues to add to its list of participating developers and publishers. Today, NCsoft announced that a number of their titles will be made available to Steam customers for the the first time along with future releases.

Starting today, NCsoft's MMO games in the City of Heroes, Guild Wars and Lineage series will all be available to download via Steam. That includes the just released Mission Architect version of City of Heroes. In addition, the upcoming fantasy MMO title Aion will also be made available for purchase and download via Steam. Aion is currently scheduled for release in the US in late 2009. At the moment you can get Guild Wars: Game of the Year Edition on Steam for a 10 percent discount and Lineage II for a 50 percent discount.