Modern Warfare 2 beta was the biggest in Call of Duty history

Infinity Ward is detailing some of the improvements coming ahead of launch, too

Modern Warfare 2 beta early access, details, and more

Call of Duty: Modern Warfare II, Call of Duty Wiki

Call of Duty: Modern Warfare 2 Multiplayer Review

Call of Duty NEXT time, date, video stream for Warzone and Modern Warfare 2 MP reveal, Gaming, Entertainment

Call of Duty 4: Modern Warfare - Wikipedia

Modern Warfare 2 Beta on Steam Brought in Nearly 110K Concurrent Players

Call of Duty: Modern Warfare II review: an uneven sequel

Infinity Ward outlines Modern Warfare 2 changes planned following the beta

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Visibility. Easily the Biggest Problem”: Fans Share Feedback on the Call of Duty: Modern Warfare 3 Beta - EssentiallySports

Call Of Duty: Modern Warfare 2 Beta Is Largest In Franchise History

Modern Warfare 2 was most played beta in Call of Duty history - Dexerto

Call of Duty: Modern Warfare II's opening weekend was the best in franchise history

Call of Duty®: Modern Warfare® II Beta Largest in Call of Duty History