Call of Duty 2 One In The Chamber Mod file

One in the Chamber consists of six players competing in a Free-for-All style game with a twist: each player starts off with only an insta-kill Desert Eagle, a single round of ammunition, a knife, and three lives.

Once a player has fired their bullet, the only means of acquiring another one is by getting a kill. This means that if a player kills an opponent with a bullet, they will get that bullet back. However, if a player happens to have no ammo left, then their only remaining method of killing is by knife. Knifing earns one bullet, which means that players can have more than one bullet at a time if they choose to knife their enemies as opposed to shooting them.

The winners of One in the Chamber are the players with the highest scores or alive the timelimit.