The Sega Saturn version of Firepro Wrestling, a six man battle royale with 4 friends vs 2 Giant Demon Arugak comps, who were unbeatable. A match lasted a few hours lol.
Guilty Gear. Im guessing over 1000 hours at this point. Atleast 500 of that as I-No. To play I-No at a serious competive level is among the hardest most impossible tasks of any video game.