In 2 player game mode, 1st Player uses “Arrow Keys” and “ Player 1 ammo – Player 1 next weapon – Player 1 lives – Player 1 grenades – Player 2 ammo – Player 2 next weapon – Player 2 lives – Player 2 grenades/5(). The objective of the “Gun Mayhem” game which has lots of guns and several tactics in, defeat your friend or bots as soon as can play in “Campaign” mode or “Custom Game” mode that you can assign selections however you can be played 1 to 4 players.