Earlier this week game developer Valve, most known for its Half-Life series, announced that Activision will start distributing some of its games using their Steam digital delivery service. Some of you might be familiar with Steam which nowadays can work to deliver downloadable version of full games, game patching, instant messaging, and more. Although there is a justified controversy on the integration between game titles and Steam, it would appear that for Activision games included in the deal so far the service will only extend to online purchase and digital delivery.

Valve has provided Shacknews with pricing information for the games. Call of Duty, Call of Duty United Offensive, and GUN will all be priced at $19.95. Call of Duty 2 will be priced at $39.95. All four games are expected to launch this month.