The first button you should use on the keyboard is the left bumper, which are useful for 'cancelling out' combo counters, but does not affect the counter that would be generated by a move that did not cancel out. There are eight total Combos in the game, which are named in the lower right corner of the screen. These combos are available simply by holding down the special combination button when you want to perform one. In the game Ultimate Mortal Kombat 3 you have an array of special moves, called 'combos.' Combos allow you to take down an opponent very quickly by adding more opponents onto your combo bar. It brings a whole new way of fighting, where the player has a limitless number of possibilities, because in this game the only real limitation is your imagination. Ultimate Mortal Kombat 3 is a brand new version of the classic PlayStation game, completely overhauled and redesigned from the ground up. Many people often think of Kombat 3, Ultimate Mortal Kombat 3 as being virtually identical to its older brother, but the truth is they're vastly different as hell.