Single-player games like Unknown Contact
Below are 12 single-player Steam games similar to Unknown Contact, 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 Unknown Contact page.
Ranked picks
- 1
The Abyss Below
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
The year is 1997. Pilot a small submersible into the depths of the Pacific to investigate a massive sonar anomaly. Navigate by instruments, scan targets, and uncover something far older than it should be.
- 2
Seal The Breach
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
A 3D survival experience set within a cramped one-man submarine exploring a hostile ocean trench.
- 3
Project SEVER
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
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.
- 4
Static Dread: The Submarine
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
Descend into Lovecraftian horror aboard a claustrophobic military submarine. Assign tasks as a captain’s right hand, analyze sonar signals, make hard decisions, and keep the crew from madness. Dark horrors lurk both within… and beyond the hull.
- 5
Ocean Pressure
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
Ocean Pressure is a singleplayer game where you as an old scientist piloting your handmade submarine in the bottom of the ocean. Your mission is explore the ocean and collect required data with help of your submarine.
- 6
Full Fathom
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie with Unknown Contact.
Full Fathom is an oceanic survival horror game. Pilot a deteriorating submarine as it drifts through grim waters, keeping it maintained as it is your only lifeline in the hostile, merciless ocean.
- 7
Arcadia Cafe
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
Arcadia Cafe - domestic horror in early 2000s. Work the night shift as a student at a roadside cafe. Meet bizarre guests, get cash for your job, but beware — homecoming may be much more horrible than you expect.
- 8
Iron Lung
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Simulation with Unknown Contact.
A short horror game where you pilot a tiny submarine through an ocean of blood on an alien moon.
- 9
Hold the Core
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie with Unknown Contact.
Hold the Core is a roguelite tower defense game about trading safety for power. Draft Risk Cards, shape enemy routes, evolve towers, and survive deadly enemies and bosses.
- 10
Bitloop
Single-player alternative to Unknown Contact — playable solo, no multiplayer required. Shares Indie and Casual with Unknown Contact.
You steer a drone's orbit while it fires for you. Ride close to break the vault faster, ride wide to live longer. Strip the ring, crack the core, fall to the next vault. A one-stick roguelite about orbital mining.
- 11
Conquer for Glory
Single-player alternative to Unknown Contact — playable solo, no multiplayer required.
A side-on strategy game about raising armies and conquering a dark fantasy world. Lead one of eight races, break the enemy line with troops, monsters and unique abilities, and take the map kingdom by kingdom.
- 12
Roll and Die
Single-player alternative to Unknown Contact — playable solo, no multiplayer required.
A push-your-luck dice roguelite. Greed gets you power. Greed gets you killed. Keep the rolls you like, push the rest, and pray you do not hit a skull. Climb the Pit to the god who runs it.