Call of Duty Online (also known as CODOL, CODO, and Call of Duty: Online, Chinese: OT}SU$Online; pinyin: Sh
mng zhohun Online) was a free, online first-person shooter video game developed by Activision Shanghai and Raven Software.

Since 2009, a Call of Duty game has been the best-selling game of almost every year. Its latest game, Call of Duty: Modern Warfare III,  releases in November, and will be the first title from publisher Activision Blizzard under its newest owners, Microsoft.