Once upon a time, Rare's Killer Instinct was a huge franchise for Nintendo, spawning a pair of popular arcade entries, plus home versions for Super Nintendo and Nintendo 64 that sold well despite being scaled-back ports. But as Rare's priorities (and owners) shifted in the years that followed, this attractive, combo-heavy fighting franchise was neglected, despite consistent fan requests for a new entry. It's now been 15 years since the last release.