IMHO.

Single-player games like Astronomia

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

Ranked picks

  1. 1
    A Simple Square — Steam game cover

    A Simple Square

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

    A Simple Square is a minimalist puzzle game where every move changes the level. Slide in straight lines, erase the tiles behind you, plan your path, and reach the exit without trapping yourself.

    2026StrategyIndieCasualSingle-playerSimilar games →
  2. 2
    Circuit Pulse — Steam game cover

    Circuit Pulse

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

    Circuit Pulse is a circuit puzzle game. Route glowing energy through cables and components on a board. Split, merge, and time pulses to power targets and trigger chain reactions across a board of escalating challenges.

    2026IndieSimulationCasualSingle-playerSimilar games →
  3. 3
    Box Factory — Steam game cover

    Box Factory

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

    Box Factory is an isometric puzzle game where the player needs to push boxes on the right tiles in full 3D and teleports.

    2020Casual0.99 USDSingle-playerSimilar games →
  4. 4
    UFindO — Steam game cover

    UFindO

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

    Are you ready to find the difference? Then quickly run after the magnifying glass and get ready to spot the differences in an exciting puzzle game!

    2023IndieCasual0.99 USDSingle-playerSimilar games →
  5. 5
    Space Drone: Rescue Mission — Steam game cover

    Space Drone: Rescue Mission

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

    Space drone is a minimalist open world puzzle game with grid movement where you remotely control a drone to find and rescue your lost mates in space. Every movement spend energy, be aware to don't be without it!

    2021StrategyIndieCasual1.99 USDSingle-playerSimilar games →
  6. 6
    Unblocking — Steam game cover

    Unblocking

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

    Unblocking is a casual VR game based on dragging piece blocks to clear lines/boards. It supports 3 game modes: Puzzle (multiple levels), Relax (time limit mode) and Arcade (lifes based mode)

    2023IndieCasualFreeSingle-playerSimilar games →
  7. 7
    ReactorX — Steam game cover

    ReactorX

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

    Sokoban-puzzle with exclusive gameplay mechanics on a space fantasy theme.

    2023IndieCasual4.99 USDSingle-playerSimilar games →
  8. 8
    GraviFire — Steam game cover

    GraviFire

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

    GraviFire is a logic game that mixes the mechanics of movement and gravity. You need to put all the objects in the right places by controlling the character and the force of gravity. It will not be easy to complete the task by overcoming all obstacles.

    2020StrategyIndieCasual3.99 USDSingle-playerSimilar games →