Brawler with an interesting structure
I remember picking up The Peace Keepers used for $5 back in the 90's, and I ended up playing it for a good 10 hours or so. It's mostly a standard console brawler, but it has a few key things going for it:
Character variety is good, as there are 6 unique characters with different moves and attributes. This makes each playthrough pretty different, and 2 player is a fair bit of fun. On top of that the structure of the game consists of a very large number of branching paths. The order of events can change drastically based on what you do, and there are some fun secrets to be found with full exploration. If you're in to brawlers, this is a niche title that you should take a look at.