Single-player games like Secrets of the Dark Fortress
Below are 9 single-player Steam games similar to Secrets of the Dark Fortress, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Secrets of the Dark Fortress page.
Ranked picks
- 1

Tears of Vanfell
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Your life begins anew in front of an imposing mountain... Climb and explore it with a wide cast of characters in this dungeon crawler RPG with up to four player Co-op.
- 2

Heaven Crawler
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Explore The Womb, a forgotten man-made tower built to reach the heavens. Wield Mechanical Arms to overcome deadly enemies and carve your path upward on a deeply personal journey. And remember: Bring her back.
- 3

Koshmar: The Last Reverie
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Adventure with Secrets of the Dark Fortress.
When a city falls to a sleeping plague, nightmares rise up. Awaken the city as a mortician’s daughter who walks the line between the sleeping and the waking. Fight through the dreams, seal the rifts, make choices that chip away at who she is, try to become the nightmare that nightmares fear.
- 4

Umbra Survivors
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
The first 3D Gothic Survivors-like on Steam. Thousands of enemies. One survivor. No mercy. Fight through endless hordes, roll rare card upgrades and forge broken builds. Every level-up can change your entire run. Multiple playable characters. Epic bosses. Seasonal events.
- 5

Kernel Hearts
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Gather your allies. Eliminate Angels. Transform into a Magical Girl. Slay god. Kernel Hearts is a Multiplayer Co-Op Roguelike Action RPG about four magical girls and their attempt to save a world that's drowning in ashes
- 6

幻想郷大激突 : Touhou Impact
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
幻想郷大激突 : Touhou Impact is an unofficial Touhou Project fan game. Youkai have appeared—far too many of them. This is clearly an incident, but don't worry. In Gensokyo, the answer is simple: beat them all up first, then find the culprit later.
- 7

Riftslayer
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Riftslayer is a fast-paced 3D action roguelite. Fight massive waves of enemies, combine weapons and perks into powerful builds, and face dangerous bosses. Every run becomes more chaotic, more powerful, and more unpredictable.
- 8

Rogue Blight
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Rogue Blight is a rogue-lite with focus on souls-like combat, featuring a Slay The Spire-inspired map system. Fight your way through ever-changing maps. Customize your playstyle based on what you find. Death is punishing. Only skill and persistence will carry you forward.
- 9

Secrets of the Witch House
Single-player alternative to Secrets of the Dark Fortress — playable solo, no multiplayer required. Shares Action and Indie with Secrets of the Dark Fortress.
Secrets of the Witch House is a challenging, procedurally generated, permadeath, action roguelike. Encounter fierce monsters, dark secrets, devastating weapons and pachinko as you wage war against an ancient evil.