Call of Duty Online

It was a free-to-play game, making it the first such title in the Call of Duty series.

Following the launch of Call of Duty: Modern Warfare 2, Activision began attempts to sell a Call of Duty game in the Chinese market but struggled with the cost and Chinese distribution laws.

However, in 2011, Activision partnered with Tencent to create an exclusive Chinese title for the franchise.

[2] The game also allowed players to purchase and/or rent cosmetics for their in-game avatars.

[3] After its launch, the game released updates that included new weapons and features from recent installments in the larger franchise.