A tournament held by Ultratech soon turns to a battle for survival. Fighters from Agencies, Temples, Castles, Labs, and Outer Space converge with different vendettas and a common goal, Champion Of Ultratech.
- 2 Player
Killer Instinct was originally titled "Brute Force", with the name being changed much later in development, along with that of most of the characters.
Killer Instinct features several gameplay elements unique to fighting games of the time. Instead of fighting enemies in best-of-three rounds bouts, each player has two life bars. The player that depletes the other player's life bars first wins the match. The game also introduced "auto-doubles", a feature which allows players to press a certain sequence of buttons to make characters automatically perform combos on opponents. Also featured in the game are "combo breakers", special defensive moves that can interrupt combos.