Call of Duty: Modern Warfare 2 Steam community page hints at Steam Workshop support

Call of Duty is officially heading back to Steam this year. The franchise left Valve's platform behind in favour of Blizzard's Battle.net service back in 2018, but now with this year's release of Mode

Monaco receives level editor with Steam Workshop support and Mac release - Polygon

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Modern Warfare 2 is Returning to Steam But we Might get Mod Support - Xfire

Call of Duty: Modern Warfare Remastered - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game

Call of Duty®: Next: Call of Duty®: Modern Warfare® II Multiplayer Brings the deepest, most innovative MP experience yet

Modern Warfare 2 is Returning to Steam But we Might get Mod Support - Xfire

Steam Community :: Call of Duty®

Found in a thrift store, and the code worked! I wonder if there's any servers for it : r/Steam

Call of Duty: Modern Warfare 3 - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game