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I didn't even know you could have a game with only boss battles before I played Furi. I finished it in one sitting, so it's not a long game, but because there is little downtime between fights (and I personally found the downtime very atmosphere-building), there's arguably a lot of game packed into the playthrough time. The gameplay is punishing, but the mechanics are rock-solid and not overcomplicated. And then there's the music. The soundtrack earned a permanent place in my phone's playlist. :) Definitely recommended to anyone who likes a brawler, and isn't afraid of the feeling of wanting to throw their controller through the window (no, not OUT the window; THROUGH it).
I never actually finished this game - I played it with my dad when I was a kid, and all we did was buy stuff in one system and sell it in the next, day in and day out. This thing alone kept us playing this game for weeks on end, so it's gotta count for something. :D
Considering hwo old this game is, the physics and damage model are stunning! It's easily the Spin Tires of its time. :)