2001 Alien Combat

A one-on-one beat 'em up game. The player controls a blue humanoid and must defeat alien opponents within a time limit. There are numerous moves available, triggered with the number keys: a jump, a lethal front kick, a rotation kick, various punches, and more. The player also can throw knives at the opponent, but there's a limited amount of knives, represented by a dwindling bar beneath the player's life bar.