Valve Inc. this week said Activision Blizzard Inc.’s Call of Duty: Modern Warfare II for the PC ranked as the Most Played Steam title in the latest data from the company.

This week, Call of Duty: Modern Warfare II ranked as the No. 4 Most Played Steam title.

Call of Duty: Modern Warfare II contains a Campaign that includes Task Force 141, the Special Ops tactical co-op mode, and Multiplayer for trademark versus competition.

The final game includes a new AI system for new tactical and cover techniques across Campaign and Special Ops.