Call Of Duty: Black Ops 2, Modern Warfare 2 see massive player spikes

The Call of Duty series has seen a massive player spike following a recent matchmaking update.

Players flock to classic Call of Duty games after Xbox matchmaking fix

Giant Robot, Call of Duty Wiki

Call of Duty: Black Ops 2 - Multiplayer trailer analysis

Call of Duty: Call of Duty classic video games are back but 'hackers' alert remains - The Economic Times

Xbox 360 Call of Duty games see huge spike in players after server fix

Call of Duty: Black Ops - Xbox 360

Glitches, Call of Duty Wiki

Modern Warfare 2 players infuriated by “wallhacks” ping system bug - Dexerto

Call of Duty 4: Modern Warfare - Game of the Year Edition : Activision: Video Games