Games like Lair of the Three-Headed Hydra

If you finished Lair of the Three-Headed Hydra, the closest matches are Drova: Forsaken Kin, Freshly-Picked Tingle's Rosy Rupeeland, AdventureQuest, AdventureQuest Worlds and The Dungeon Experience. All 7 share its adventure genre and are ranked by how closely their themes and modes overlap.