Tekken 2. Eclipsed only by Tekken 3 this was the quintessential fighter on ps1. It was one of a few that innovated....!
but if tekken 3 is the cornerstone of tekken's dynasty it is all built on the foundation of factors first introduced in tekken 2.
Nowadays, of course, this plays like a dinosaur, but if you're a collector...this is still available out there and is definitely worth the 2$ for the nostalgia alone.