IMHO.

Single-player games like SONAR

Below are 8 single-player Steam games similar to SONAR, 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 SONAR page.

Ranked picks

  1. 1
    Death Imminent — Steam game cover

    Death Imminent

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    Explore a planetary station lost in the far reaches of the Universe as crew members awakened from cryosleep. Work together to uncover the causes of what is happening and, if you’re lucky, survive and escape from the depths of this man-made hell.

    ActionIndieAdventureSingle-playerSimilar games →
  2. 2
    Scary Cave Diving — Steam game cover

    Scary Cave Diving

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    Can you hold your breath when panic sets in? Experience the terror of deep-sea cave diving. Scavenge resources and fight to survive as you navigate procedurally generated underwater caves stalked by an apex predator!

    2026ActionIndieAdventure4.49 USDSingle-playerSimilar games →
  3. 3
    Liha — Steam game cover

    Liha

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    LIHA: Dive Zero is a zero-gravity roguelike shooter where every descent of your rusty ship into the anomaly could be your last! Dive into chaotic battles, loot what remains, and combine new, badass weapons. The way through the depths is rough - you'll need them.

    ActionIndieAdventureSingle-playerSimilar games →
  4. 4
    Forsaken Facilities — Steam game cover

    Forsaken Facilities

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    A 1-4 player coop horror experience. Find your way through everchanging environments to gather precious treasures for your kidnappers. The more you gather the longer you will survive.

    2026ActionIndieAdventure0.99 USDSingle-playerSimilar games →
  5. 5
    Dungeon Miner — Steam game cover

    Dungeon Miner

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    A 1–4 player online co-op mining game. Small gear stays on your body, but giant crystals can only be carried in your own two arms. Pull the Dungeon Core, then haul your cart back to the ship through the collapsing mine in under three minutes. No health bar — a single hit shatters you.

    2026ActionIndieAdventureSingle-playerSimilar games →
  6. 6
    Death Horizon: Cyberfusion — Steam game cover

    Death Horizon: Cyberfusion

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    Cyberfusion is a VR roguelike, physics-based, full-body FPS that immerses you in a futuristic battlefield. Featuring cybernetic implants and procedurally generated levels, this game challenges you to adapt and survive in a world where your body is your ultimate weapon.

    2025ActionIndieAdventure14.99 USDSingle-playerSimilar games →
  7. 7
    Jester's Dungeon — Steam game cover

    Jester's Dungeon

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    An Obscure Dungeon Crawler where you a wizard, Dives into a dungeon to reclaim your stolen Toy from a wicked Jester.  Sacrifice your blood to the Black Eye and  use it's powers to survive, slay monsters and master the dungeon .

    2026ActionIndieAdventureSingle-playerSimilar games →
  8. 8
    Abyssmare — Steam game cover

    Abyssmare

    Single-player alternative to SONAR — playable solo, no multiplayer required. Shares Action and Indie with SONAR.

    Abyssmares is an action game based on Roguelite+first person shooting based on Cthulhu's mythical. [1] You play the role of a super warrior. [2] Explore the maze deep underground. [3] Continuously update your equipment and primary and secondary weapons. [4] Kill all moving creatures.

    2024ActionIndieRPG9.99 USDSingle-playerSimilar games →