Games like Castle Dark
Games like Castle Dark include Path of Exile 2, Grim Dawn, Wolcen: Lords of Mayhem, Black Myth: Wukong, and Last Epoch. We matched them by the tags players give Castle Dark on Steam (Action, RPG, Adventure, Action RPG, and Dungeon Crawler): closest matches first, and among equally close ones the better-known games.

Path of Exile 2
Shared: RPG · Action RPG · Hack and Slash

Grim Dawn
Shared: Action RPG · RPG · Hack and Slash

Wolcen: Lords of Mayhem
Shared: Action RPG · RPG · Hack and Slash

Black Myth: Wukong
Shared: Action · Action RPG · RPG

Last Epoch
Shared: Action RPG · RPG · Hack and Slash

Diablo® IV
Shared: Action RPG · RPG · Hack and Slash

Torchlight II
Shared: RPG · Action RPG · Hack and Slash

The Incredible Adventures of Van Helsing
Shared: RPG · Action · Action RPG

Minecraft Dungeons
Shared: Adventure · RPG · Action

Warhammer 40,000: Inquisitor - Martyr
Shared: RPG · Action · Action RPG

DARK SOULS™: REMASTERED
Shared: RPG · Action · Dark Fantasy

Path of Exile
Shared: Action RPG · Hack and Slash · RPG

Middle-earth: Shadow of War
Shared: Action · RPG · Adventure

Torchlight III
Shared: RPG · Action · Adventure

Gothic 1 Remake
Shared: RPG · Adventure · Action

Dragon's Dogma 2
Shared: RPG · Action RPG · Action

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Action

Middle-earth™: Shadow of Mordor™
Shared: Action · Adventure · RPG

Minecraft Dungeons II
Shared: Action · RPG · Adventure

God of War
Shared: Action · Adventure · RPG

Torchlight
Shared: RPG · Action RPG · Dungeon Crawler

God of War Ragnarök
Shared: Action · Adventure · RPG

FATE
Shared: RPG · Action · Adventure

Book of Demons
Shared: RPG · Dungeon Crawler · Hack and Slash

