Killer Combo...
Killer Instinct is known for having a complex and standardised combo system, based on three strengths of moves (Quick, Medium, and Fierce). A special move or jump-in move, followed immediately by a second move, known as an auto-double, would initiate the combo sequence. The combo can then be lengthed by the use of linkers, more auto-doubles, and finishers.
However, a player is able to 'break' out of the large, and potentially devastating combos, via a special attack (known as a "combo breaker"). The combo breaker has to be of a strength superior to the exact move in the combo to be successful.
At the end of a match players are able to perform a finishing move (similar to those in Mortal Kombat), known as a Danger move. Additionally, a player could also use an Ultra finisher or Ultimate finisher when his/her opponents lifeline is extremely low. The Ultra finisher would link automatically into an Ultra combo, which could theoretically push the maximum number of combo hits to 80. Finally, the winning fighter could also make the loser dance in a generic finishing move known as an 'Humiliation'.
If your into fighting games, this is one of the altime greats. There have been rumors floating around that a KI4 would be out in the next 1 - 2 years of writing this review. I sure hope they are going to be true. Get an N64 just for this game, honestly.