Crystalis (NES one not GBC). Although it's not necessarily underrated, more just unknown. The people who have played it, can mostly attest to it's greatness, but it just never took off to be popular.
For a game that is generally unappreciated, that I just love. The Bouncer (PS2), maybe if I paid 50 bucks for it brand new and got a game that I could be in an hour to two I would think differently. However I paid maybe five bucks for it, and there is always that day, where my NES isn't hooked up that I want to just pick up a game and beat it in that sitting. The NES is great for games like that. But if that's too much work, I have The Bouncer. It genuinely quick if you want it to be, and it's interesting throughout the game. I love it far too much compared to the general populous.
For a game that is generally unappreciated, that I just love. The Bouncer (PS2), maybe if I paid 50 bucks for it brand new and got a game that I could be in an hour to two I would think differently. However I paid maybe five bucks for it, and there is always that day, where my NES isn't hooked up that I want to just pick up a game and beat it in that sitting. The NES is great for games like that. But if that's too much work, I have The Bouncer. It genuinely quick if you want it to be, and it's interesting throughout the game. I love it far too much compared to the general populous.