Did the original Call of Duty have more than one game?

Question

Grey Matter Interactive was one of the creators of Call of Duty: United offensive, which was the first Call of Duty game to have a single player campaign. Grey Matter merged with Treyarch after the United offensive expansion pack was shipped. On April 26, 2015

Hagrid P Hazard · Accepted Answer

Grey Matter Interactive was one of the creators of Call of Duty: United offensive, which was the first Call of Duty game to have a single player campaign. Grey Matter merged with Treyarch after the United offensive expansion pack was shipped. On April 26, 2015

Did the original Call of Duty have more than one game?

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