Games like Cavern of Mourning
Games like Cavern of Mourning include Black Myth: Wukong, Heroes of Hammerwatch II, Hero Siege, UnderMine, and Path of Exile 2. We matched them by the tags players give Cavern of Mourning on Steam (Adventure, RPG, Action Roguelike, Action RPG, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

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

Heroes of Hammerwatch II
Shared: RPG · Action Roguelike · Action RPG

Hero Siege
Shared: Action RPG · Action Roguelike · RPG

UnderMine
Shared: Action Roguelike · RPG · Adventure

Path of Exile 2
Shared: RPG · Action RPG · Adventure

Grim Dawn
Shared: Action RPG · RPG · Dungeon Crawler

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Pixel Graphics

Halls of Torment
Shared: Action Roguelike · Action RPG · RPG

The Slormancer
Shared: Action RPG · RPG · Dungeon Crawler

Death Must Die
Shared: Action Roguelike · RPG · Pixel Graphics

Wolcen: Lords of Mayhem
Shared: Action RPG · RPG · Adventure

Dead Cells
Shared: Adventure · Action Roguelike · 2D

Minecraft Dungeons
Shared: Adventure · RPG · Dungeon Crawler

Moonlighter
Shared: Action Roguelike · Dungeon Crawler · RPG

Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · 2D

Minecraft Dungeons II
Shared: Adventure · RPG · Action RPG

Stoneshard
Shared: RPG · Pixel Graphics · 2D

Eastward
Shared: Adventure · RPG · Action RPG

CrossCode
Shared: RPG · Action RPG · Pixel Graphics

Eiyuden Chronicle: Rising
Shared: Adventure · RPG · Action RPG

Noita
Shared: Dungeon Crawler · Pixel Graphics · 2D

bit Dungeon II
Shared: RPG · Action Roguelike · Adventure

BlazBlue Entropy Effect
Shared: Action Roguelike · Action-Adventure · 2D

God of War Ragnarök
Shared: Adventure · RPG · Action-Adventure