Planet Sandbox: free simulation game you can play in your browser

Planet Sandbox thumbnail

Launch meteors to grow planets and experience the life of the universe. Ranking and collection.

Game info

Genre	Simulation
Price	Free (no download, no sign-up)
Platform	Phone and PC browsers (3D graphics; needs a WebGL-capable browser)
Language	Japanese UI only
Ranking	Yes
Save	Auto-saves in your browser
Release date	2026-07-19

This game's in-game text is in Japanese. The controls are tap, swipe or click based, so you can usually get started without reading it.

Simulation · 2026-07-26
Kofun HunterJapanese UI
Survey and excavate ancient burial mounds across Japan to fill your encyclopedia.
▶ Play free
Simulation · 2026-07-29
Hakoniwa Pet FarmJapanese UI
Raise companions in a tiny diorama garden.
▶ Play free
Simulation · 2026-05-14
Ikebana Pottery LifeJapanese UI
Make and paint ceramics, then arrange flowers: an ikebana x pottery craft game.
▶ Play free
Simulation · 2026-04-25
Idle EarthEnglish UI available
Place plants and animals on a planet and grow its evolution and civilization in this idle simulation.
▶ Play free