Games like The Fortress
Games like The Fortress include Darkest Dungeon®, Darkest Dungeon® II, The Binding of Isaac: Rebirth, Stoneshard, and Exanima. We matched them by the tags players give The Fortress on Steam (Adventure, Dungeon Crawler, Roguelike, Mystery Dungeon, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon®
Shared: Dungeon Crawler · Roguelike · Dark Fantasy

Darkest Dungeon® II
Shared: Dungeon Crawler · Dark Fantasy · Roguelike

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

Stoneshard
Shared: Roguelike · Dungeon Crawler · Adventure

Exanima
Shared: Dungeon Crawler · Adventure · Dark Fantasy

Noita
Shared: Roguelike · Dungeon Crawler · Adventure

Little Nightmares II
Shared: Adventure · Horror · Dark

Dead Cells
Shared: Adventure · Roguelike · 2D

KLETKA
Shared: Adventure · Horror · Roguelike

Fear & Hunger 2: Termina
Shared: Dark Fantasy · Dungeon Crawler · Horror

Well Dweller
Shared: Action-Adventure · Dark Fantasy · Adventure

Crown Trick
Shared: Roguelike · Dungeon Crawler · Adventure

Labyrinth Of The Demon King
Shared: Dungeon Crawler · Adventure · Dark Fantasy

Darkwood
Shared: Adventure · Horror · Dark

Hellslave
Shared: Dungeon Crawler · Dark Fantasy · Adventure

Grim Dawn
Shared: Dungeon Crawler · Dark Fantasy · Adventure

Touhou Genso Wanderer -Reloaded-
Shared: Adventure · Roguelike · Mystery Dungeon

Iratus: Lord of the Dead
Shared: Roguelike · Dark Fantasy · Dark

The Binding of Isaac
Shared: Roguelike · Dark · Adventure

Enter the Gungeon
Shared: Roguelike · Dungeon Crawler · Adventure

Book of Demons
Shared: Dungeon Crawler · Dark Fantasy · Adventure

The Midnight Walk
Shared: Adventure · Dark Fantasy · Horror

暖雪 Warm Snow
Shared: Roguelike · Action-Adventure · 2D

Little Nightmares
Shared: Adventure · Horror · Dark