Single-player games like Stardust Sandbox
Below are 8 single-player Steam games similar to Stardust Sandbox, 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 Stardust Sandbox page.
Ranked picks
- 1
Alembic
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
A falling-sand sandbox built on the **real periodic table**. Every element has genuine physical properties, and reactions emerge from real chemistry — rust iron, ignite thermite, run a galvanic cell, split a uranium pile to criticality. Discover it all in an encyclopedia that fills as you play.
- 2
Powdertron
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
A physics sandbox built on real chemistry. Drop 674 materials into a falling-sand world and watch them react, burn, freeze and explode. Then wire circuits, test wings in a wind tunnel, or split light through lenses — alone or with friends online.
- 3
Sand in a Box
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
Sand in a Box is a 'falling sand' game that simulates thermal flow, electricity, radioactive decay, and gravity. Create art, experiment with physics, and craft your own simulation rules with user-friendly mod support!
- 4
Sand:box
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
"Falling sand" style particle sandbox, now with circuits and stickmen!
- 5
Alchemy Laboratory: Simulator
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
Dive into a world of creation and discovery, where each element combines to form new ones. Experiment freely in this interactive sandbox. But be careful: every combination has its consequences..
- 6
GizmoLab VR
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
A VR sci-fi sandbox game where you can put your skills to the test to build crazy inventions, with mechanics analogous to real-life electrical engineering.
- 7
Sediment
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
A pixel-physics sandbox. Fifty materials, and every one of them is physics: sand finds its angle, water freezes, lava crusts into stone, gunpowder blows. Build your own materials and worlds, and share them in the Workshop.
- 8
Liquid Havoc
Single-player alternative to Stardust Sandbox — playable solo, no multiplayer required. Shares Indie and Simulation with Stardust Sandbox.
Craft custom liquids with mind-bending properties and create immersive scenes using the Scene Editor! Enjoy 60+ simulations that bring realism to destruction with shatter physics, soft body dynamics, real-time fluid simulation, structural integrity, and other exciting features!