Kill the King (KtK) is a new mod which changes the Call of Duty 4 experience dramatically by dividing teams in two groups - assassins and guardians. At first, one lone assassin must strive to kill the king - whilst dodging the guardians. Killing a guardian will respawn him as an assassin, who can then help to kill the King.
Very unique mod, it's very well designed and haven't found any bugs.
Gameplay is really fun, everyone who has CoD4 should try it :)