Games like Once upon a Dungeon II
Games like Once upon a Dungeon II include Darkest Dungeon®, Tales of Maj'Eyal, Elin, Path of Achra, and Caves of Qud. We matched them by the tags players give Once upon a Dungeon II on Steam (Roguelike, Traditional Roguelike, Dungeon Crawler, Turn-Based Combat, and Open World): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon®
Shared: Dungeon Crawler · Roguelike · Turn-Based Combat

Tales of Maj'Eyal
Shared: Roguelike · Traditional Roguelike · Dungeon Crawler

Elin
Shared: Roguelike · Open World · Traditional Roguelike

Path of Achra
Shared: Roguelike · Turn-Based Combat · Dungeon Crawler

Caves of Qud
Shared: Turn-Based Combat · Open World · Traditional Roguelike

Stoneshard
Shared: Roguelike · RPG · Dungeon Crawler

Noita
Shared: Roguelike · Dungeon Crawler · Open World

Dungeons of Dredmor
Shared: Roguelike · Traditional Roguelike · Dungeon Crawler

Shattered Pixel Dungeon
Shared: Traditional Roguelike · Roguelike · Dungeon Crawler

Hades II
Shared: Roguelike · Dungeon Crawler · RPG

Megaloot
Shared: Dungeon Crawler · Roguelike · RPG

Titan Quest II
Shared: Dungeon Crawler · RPG · Open World

Zorbus
Shared: Roguelike · Traditional Roguelike · Dungeon Crawler

Hades
Shared: Roguelike · Dungeon Crawler · Indie

Dungeonmans
Shared: Roguelike · Traditional Roguelike · Grid-Based Movement

The Binding of Isaac: Rebirth
Shared: Roguelike · Dungeon Crawler · Indie

The Doors of Trithius
Shared: Traditional Roguelike · Roguelike · Open World

Crown Trick
Shared: Roguelike · Turn-Based Combat · Dungeon Crawler

Chronicon
Shared: Dungeon Crawler · RPG · Crafting

Soulash 2
Shared: Open World · Traditional Roguelike · RPG

Heroes of Hammerwatch II
Shared: Dungeon Crawler · Roguelike · RPG

Rogue Empire: Dungeon Crawler RPG
Shared: Traditional Roguelike · Dungeon Crawler · Roguelike

Path of Exile 2
Shared: RPG · Dungeon Crawler · Loot

Slay the Spire 2
Shared: Roguelike · Turn-Based Combat · Indie