Crystal Rift by Psytec Games is one of the earliest Dungeon Crawler VR games that we've seen so far. The game was inspired by classics like Dungeon Master and Eye of the Beholder. This is a horror / exploration game that features 26 different levels. The player slowly uncovers the narrative and story through exploration, discovering dark secrets and following the path of those who have come before. The game even features a level editor, where you can make additional levels that other players can sample. The game is available on all three major VR platforms.