Single-player games like SUBJECT 404
Below are 8 single-player Steam games similar to SUBJECT 404, 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 SUBJECT 404 page.
Ranked picks
- 1
Spectral Sonata
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
A first person psychological horror game. Explore an ever-changing mansion in a slow-paced, atmospheric experience that combines hauntingly beautiful melodies with a suffocating environment. Uncover the tragic past, escape or confront the spirit.
- 2
Tear Factory
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
A game about hunting rats, feeding them to your family, and going to bed.
- 3
Guadeloupe : The Secret of the Three Rivers
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
A trail of ash threatens Guadeloupe. Papa D'lo, the water spirit, has dried up the rivers to unleash a cataclysm. Using a controller or powered by the EVEIA smart pedal device, follow the source to the summit of La Soufrière to purify the island and break the curse!
- 4
Room 337
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
You are a father. You wake in a hallway that hums. Empty pools. Dead malls. Your four daughters are here. Voice acted by a real father and his daughters. Two endings. No right answer.
- 5
Not Yet
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Adventure with SUBJECT 404.
NOT YET is a first-person psychological horror experience where silence grows heavier the deeper you go, and hesitation becomes its own consequence.
- 6
Lost Alone Ep.1 - Sorellina
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
Growing up with his paternal grandmother, George emerges from the spiral of alcohol addiction by meeting his fiancée Hanna. But his childhood traumas will soon return to haunt him, pushing him into the abyss of despair.
- 7
murmures
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
Clara is doing everything she can to stay emotionally stable. But something is hunting her, and every place she passes through seems to know what she still refuses to understand. Roll your d20s to explore, search, hold on, and help Clara find a way out.
- 8
House of Tides
Single-player alternative to SUBJECT 404 — playable solo, no multiplayer required. Shares Indie and Adventure with SUBJECT 404.
Descend into a shifting labyrinth of memories, imagined lives, and fractured identities in this first-person psychological sci-fi horror game about grief, guilt, and obsession, set inside a forgotten theatre beneath a drowned world.