Good quest?

I suggest:

Megaman Dr wily's revenge DC (hard but fun)

Metroid R-XL remake (it plays like a frikken metroid game! Sweetness!)

Evil castle (best sidecrolling quest there is!)

that's all I really know. good luck out there

Isle of the winds by darkflamewolf. Not super-hard, but does get a bit challenging on the way. Or Hidden Duality DC, not extremely enemy-hard but it is the king of all puzzle quests. Tortuga is one of the highest rated too but I never played it.

Ganon's Claim, Castle Haunt 1 & 2, Link to Tortuga.

Or you can try any of mine: Link's Retirement is my best.

MMDWDC Is the best out there and it even works with 2.10 but problem are bosses like the first boss in the powerstation which sometimes you get stuck with the conveyers!

Thanks I will certianly try them out

definitely play Hidden Duality. Best quest ive played so far. The puzzles in the dungeons feel like algebra exams.