IMHO.

Single-player games like SUM

Below are 10 single-player Steam games similar to SUM, 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 SUM page.

Ranked picks

  1. 1
    Afloat — Steam game cover

    Afloat

    Single-player alternative to SUM — playable solo, no multiplayer required. Shares Adventure and Simulation with SUM.

    Afloat is a VR survival game, where you gather resources, craft items and upgrade your raft.

    2019AdventureSimulationCasual5.99 USDSingle-playerSimilar games →
  2. 2
    You Are a Bird — Steam game cover

    You Are a Bird

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

    You Are a Bird is an immersive VR bird flight sim where your real arms become wings. Flap and angle your wings to explore and hunt in VR. Based on real bird flight mechanics and soaring flight physics.

    2020IndieAdventureSimulation19.99 USDSingle-playerSimilar games →
  3. 3
    Inside The Cubes — Steam game cover

    Inside The Cubes

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

    ITC is the story of Andy who is kidnapped by Tisafolians. Andy is put into a station, in where there is no gravity, to be tested some skills that are observation, analytical intelligence, eye hand coordination, weakness, etc. Your choices matter and change the end of the game.

    2019IndieAdventureSimulation3.99 USDSingle-playerSimilar games →
  4. 4
    VRIKING — Steam game cover

    VRIKING

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

    VRIKING is a Runner game in VR! Accelerate as fast as you can while collecting points along the way! Dodge the approaching obstacles!

    2023SportsIndieAdventure7.99 USDSingle-playerSimilar games →
  5. 5
    Moonstone Crossroads — Steam game cover

    Moonstone Crossroads

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

    Moonstone Crossroads is an open world VR game filled with various activities such as farming, Driving, hunting, mini-games, climbing, and more! It is a new in-depth VR world experience!

    2019ActionIndieAdventure9.99 USDSingle-playerSimilar games →
  6. 6
    J15 Jet Fighter VR (歼15舰载机) — Steam game cover

    J15 Jet Fighter VR (歼15舰载机)

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

    The J15 Jet Fighter is a modern air combat VR Game, You will be driving the J-15 fighter, carrying out training missions and combat missions on the Liaoning aircraft carrier.

    2018ActionSportsStrategy9.99 USDSingle-playerSimilar games →
  7. 7
    Battlewake — Steam game cover

    Battlewake

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

    Fight for dominion in Battlewake, a fantasy naval combat game built for VR. Play as 4 mythical pirate lords, captain massive battle-ready warships, and summon ancient powers as you set sail on a larger-than-life nautical war for the ages.

    2019ActionStrategyIndie29.99 USDSingle-playerSimilar games →
  8. 8
    Aeon — Steam game cover

    Aeon

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

    A primitive god in ancient Greek mythology who controls time, is resurrected in the virtual world, Inspired by "The Matrix" and "Deadpool" (remember,the slower you move the slow time goes)

    2017ActionIndieAdventure9.99 USDSingle-playerSimilar games →
  9. 9
    VR_PlayRoom — Steam game cover

    VR_PlayRoom

    Single-player alternative to SUM — playable solo, no multiplayer required. Shares Simulation and Casual with SUM.

    Play a game with your friends to reach the highest score.

    2018ActionSportsSimulation2.99 USDSingle-playerSimilar games →
  10. 10
    VR_PlayRoom : Episode Beginning (Escape Room - Horror) — Steam game cover

    VR_PlayRoom : Episode Beginning (Escape Room - Horror)

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

    The main goal of this game is to find clues and escape the room using things in the room.

    2018ActionIndieAdventure4.99 USDSingle-playerSimilar games →