Boss

A boss is a computer-controlled enemy that is usually stronger than regular opponents or boasts particular strengths and weaknesses which must be exploited by the player in order to defeat them. Bosses are usually fought at the climax of a level (which may be called a boss level) or section, in what is known as a boss battle or fight. Bosses serve to test the player's ability and skills in playing the game, either generally or with emphasis on skills that have been learnt in the previous level.