Single-player games like Threshold 15
Below are 9 single-player Steam games similar to Threshold 15, 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 Threshold 15 page.
Ranked picks
- 1
Our Doomed Bunker
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
Our Doomed Bunker is a short 1-4 player co-op stealth/puzzle horror game
- 2
Lesson In Progress
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
This psychological puzzle based mascot horror is designed to tell a story. Manage your stress as reality begins to distort. When you panic, doors stop responding and hallucinations creep in. Uncover the secrets of this school.
- 3
Quiet Valley 2
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
A 2.5D indie horror game with a strange reverse-fish-eye presentation. Explore and uncover lore and scares. Contains jumpscares and atmospheric/story-driven elements. Be thorough to unlock both endings if you are a completionist, but watch out behind you.
- 4
Search
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
Play as a Park Ranger in Dreary Lake Provincial Park and unravel the mysteries your coworkers are trying to keep hidden. PSX Style First Person Thriller.
- 5
OAN
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
A Vietnamese folk horror in pixel art. Return alone to the abandoned family house for your grandfather's death-anniversary vigil. Light three sticks of incense before dawn, and keep the oil lamp burning. Something folded from paper is already in the house, and it does not want the rite finished.
- 6
Tear Factory
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
A game about hunting rats, feeding them to your family, and going to bed.
- 7
VHS // Anima 021
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
VHS // Anima 021. Explore liminal labyrinths in search of anomalies in a first-person “found footage”-style adventure featuring retro graphics. Avoid the entities lurking in the shadows and uncover the truth hidden within the VHS tapes.
- 8
Dead Garden Zero
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
Find as many of your friends as possible before the monster gets you. Save all you can, as the amount of friends you have is endless! You can't save them all but find the best strategy and do your best sweetie! I hope everything's ok and hope you'll enjoy this mini game I finished for you.
- 9
Vlare
Single-player alternative to Threshold 15 — playable solo, no multiplayer required. Shares Indie with Threshold 15.
A supernova, a broken telescope, Lum, and a night full of strange encounters and painful memories. Join Eli on a short, emotional point-and-click journey through the city.