

The players can change how difficult it is to kill the AI opponents much like single player's difficulties: Recruit, Regular, Hardened, and Veteran. It features a separate ranking and unlock system with AI opponents instead of online enemies. It serves as a simulation of online multiplayer for those who are new to it and those who want to try out new tactics or practice with different weapons. Combat Training is a game mode featured in Call of Duty: Black Ops, Call of Duty: Black Ops IIand Call of Duty Online.
