Chrono Cross. There was a boss I was having a tough time with because apparently I was supposed to steal an item from an earlier enemy. It wasn't like I intentionally quit, I just put it down and never got around to playing again.
I hate games that are like this.
I quit playing the final chapter of Final Fantasy IV the After Years (Wii version) after a certain party member died and the game became almost unbeatable with what remained in my party. I found out later that if I had certain members in my active party that the death would not have happened which made me extremely angry. I abandoned the game for a year out of anger and eventually tried the final chapter again with the right party members and found it to be rather easy at that point. That said, the game gets pretty poor marks in my book as I think it is a terrible game design decision for a modern rpg game (made in the last 25 years) to require gamers to read a walkthrough in advance of playing. I can accept needing a walkthrough to 100% a game, but it should never be needed in order to finish the main story.
Chrono Cross is on my list of games to play and so I appreciate the heads-up warning here. I will have to look up the name of this particular enemy before I play.