Single-player games like 7821 Akuji
Below are 8 single-player Steam games similar to 7821 Akuji, 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 7821 Akuji page.
Ranked picks
- 1
Dark of the Depths
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Simulation with 7821 Akuji.
A first-person deep sea exploration game. Use only a torch to navigate through rusted structures, encountering both dangerous and harmless sea creatures. Uncover the mysteries of the trench, and experience the phobia-inducing atmosphere of the ocean floor.
- 2
ABYSS - 9
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Indie and Adventure with 7821 Akuji.
In the year 5026, you are a disposable miner sent to the bottom of the ocean on the ABYSS-9 expedition. Pilot your 'iron coffin', manage unstable vital systems, and survive uncharted abyssal creatures. In the abyss, silence is as dangerous as the pressure.
- 3
DepthWake
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Adventure and Simulation with 7821 Akuji.
Return to an Earth abandoned for over 500 years and explore its transformed oceans in search of vital resources. With supplies on humanity's new home world running dry, you must gather materials, build automated underwater operations, and uncover the secrets that now lie beneath the waves.
- 4
Iron Lung
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Indie and Adventure with 7821 Akuji.
A short horror game where you pilot a tiny submarine through an ocean of blood on an alien moon.
- 5
The Trench
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Indie and Adventure with 7821 Akuji.
As captain of the Pandora sub, you must explore the Trench and retrieve data from the Neptune wreckage. But beware - the trench is home to unimaginable horrors that will test your courage. Can you survive the terrors of the deep and complete your mission, or will you become the next victim?
- 6
Deep Saturation
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Adventure and Simulation with 7821 Akuji.
Deep Saturation is a short analog horror game inspired by real limnic disasters. Navigate a fog-choked lake, deploy failing equipment, and document the depths with single-use cameras. What you capture may reveal more than you ever wanted to know.
- 7
Project SEVER
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Indie and Adventure with 7821 Akuji.
Project Sever is a fusion of submarine simulator and horror. Master the controls of the Soviet Project "Sever" submarine and learn to keep it in working order to escape the deadly underwater trap and solve the mystery of the Anomalous Zone.
- 8
Biolum
Single-player alternative to 7821 Akuji — playable solo, no multiplayer required. Shares Indie and Adventure with 7821 Akuji.
Biolum is a 30min VR sci-fi narrative experience. Dive to uncharted depths of the ocean and discover a beautiful world of bioluminescent creatures. But all is not what it seems. What lies beneath the surface?