A turncoat.
You control and play as the character in a first-person perspective. However, the game features more than one protagonist and the game switches between these protagonists; therefore technically, making Call of Duty a third-person game.
A "spectator".
An umpire.
lover
Call of Duty is a First Person Shooter (FPS).
Multiplayer ?
lover
a poacher
No, you both need the game.
No, Call of Duty is not a movie it is a first-person shooter game for PC.
The person is a poacher.
a person who creates games is called a game designer