You asked for it so here it is. The 2 player version of the great Boxhead series. Two players can play as opponents or together in cooperative mode. The one player mode is also improved with more stages. Grab a friend and kill them!!
Bravo to Crazymonkeygames for this one.
Movement: Player 1:Arrow Keys - Player 2:W, A, S, D Keys
Shoot: Player 1 (Single Player): Space Key - Player 1 (Multi Player): / Key - Player 2: Space key
Changing Weapons: Single Player: Number Keys - Player 1 (Multi Player): . and , Keys - Player 2: Q and E Keys
Pause: P Key