Well, there's quite a few quests that I think are underrated.
Golvellius, one of the most easily overlooked gems. This quest is a perfect example for a professional old-school styled game.
Vault of Souls, which is a quest made in 2 weeks. For 2 weeks, this is really incredible, as there is a custom subscreen, custom enemies and custom items. These things make for a entirely different experience than any other quest.
The Darkness Within, a quest with an amazing story and interesting characters, items and gameplay ideas. The quest is not without issues, but it's something you should check out.
Russian, also a 2 week quest, which has brilliant screen design and very creative dungeon ideas. The quest is overall really solid and, just like Vault of Souls, easily overlooked.
Promised Lands, which is one of the very best quests out there. It's simply magic and it's my personal favourite, but people might be scared off by the difficulty or the style clash.
In the Lost kingdom of the Banana Blood God, a GB quest that is not submitted to the database currently, but is extremely great in terms of overworld, dungeons, story, items, ideas, bosses and everything. The humour is also amazing. Definetly a must-play.
Edited by Avataro, 31 October 2014 - 09:34 AM.