Single-player games like うみのもくず / Depths Debris
Below are 9 single-player Steam games similar to うみのもくず / Depths Debris, 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 うみのもくず / Depths Debris page.
Ranked picks
- 1
飢界
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
『飢界』は不気味な異界を探索し、脱出を目指すホラーゲーム。異界の住人に食べられてはいけません...。
- 2
Last Lesson
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required.
It's your first night as the caretaker of a scary quest. The last visitors have gone home. You need to turn off the lights, check the equipment and not die of horror, because someone or something suddenly starts a nightmarish game. With you in the lead.
- 3
Don't Flee
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
Don't Flee is a psychological horror thriller. Each new step can be the character's last. Your light is your life. Will the protagonist be able to overcome his fears and get out of the abandoned school by unraveling the cause of the incident...
- 4
ナレハテ / Karma
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
Explore the mysterious world of hell in this walking simulator. Search for six hearts while encountering strange characters and impressive landscapes. The haunting music, composed for this game, draws you deeper into the depths of hell.
- 5
5番線おじさん救出編 Platform 5 Dungeons
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
The long-awaited sequel to Japan’s hit “Nibansen” is here! This new rescue-horror in the “Bansen Series” goes beyond anomaly hunting. Enter massive Senjuku Station (千宿), full of oddities, and save the stranded old man. Now the truth of “Nibansen,” “Sanbansen,” and “Platform 4” is revealed…
- 6
Backmooms
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
You’ve wandered into a strange dimension while shopping.A mysterious monster is chasing you.You must escape."Backmooms" is a first-person adventure game.
- 7
The Gretlow Tapes
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required.
Armed with nothing but your camera, investigate the abandoned Gretlow House in this short, atmospheric horror game. Uncover a chilling mystery through a realistic found-footage lens.
- 8
September 7th
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required.
"September 7th" is a short horror game released for Christmas. The plot of the game is simple to the point of banality, and the gameplay is not delayed.The game also contains some Easter eggs and mentions. The game takes place in 2009.
- 9
虎馬 / Trauma
Single-player alternative to うみのもくず / Depths Debris — playable solo, no multiplayer required. Shares Action with うみのもくず / Depths Debris.
"Trauma" is a walking simulator action-adventure game sprinkled with horror elements. The only action you can perform besides walking is stabbing with a knife. Enjoy your journey into the strange world of dreams.