Single-player games like Alchemy Laboratory: Simulator
Below are 9 single-player Steam games similar to Alchemy Laboratory: Simulator, 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 Alchemy Laboratory: Simulator page.
Ranked picks
- 1

Universe Sandbox
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
- 2

Terra Logic
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
Sculpt planets and landscapes, watch water and climate respond, and compare two versions of the same world. Import heightmaps, draw mountain ranges, and export flat terrain to Minecraft Java. Explore Earth, ancient continents and distant worlds at your own pace.
- 3

Sediment
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
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.
- 4

Space Crash Simulator
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!
- 5

Sand:box
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
"Falling sand" style particle sandbox, now with circuits and stickmen!
- 6

Kerbal Space Program
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 7

Sandboxels
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
Falling-sand sandbox game with 500+ elements, chemistry, fire, life, food, and anything you can imagine.
- 8

The Sapling
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Simulation with Alchemy Laboratory: Simulator.
The Sapling is a short simulation game where you design your own plants and animals, and put them in a world together. Or you turn on random mutations, and see what evolution does to your ecosystem!
- 9

Fly West
Single-player alternative to Alchemy Laboratory: Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Alchemy Laboratory: Simulator.
A nostalgic love letter to old-school Flash launcher games: aim, charge, and fire a reckless cowboy across the Wild West. Bounce off hazards, trigger mid-air blasts, buy absurd upgrades, and turn every glorious faceplant into your next big payday.