"Before 2024, Activision sold digital versions of PC Call of Duty titles on Valve's successful Steam platform. In 2024, Activision decided to take the game off of Steam and make it exclusively available on Battle largely to attract users to, and grow, Activision's own platform. Battle.

Modern Warfare 2 won't launch if the game launcher like Steam or Battle you use for this game is run without administrative privileges. Hence, to solve this issue, you can try reopening the specific game launcher as an administrator. Step 1: Right-click the shortcut of your game launcher and select Properties.