Minecraft is a sandbox game that revolves around using building blocks to create anything you want. At night, monsters come out; make sure to build a shelter before that happens. The game also has multiplayer capabilities.
Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner, Minecraft, and the like.
Roblox allows you to create games, build whatever you want with lego-like bricks, play other games made by users of the community, and even participate in the economy by trading, selling, buying, and collecting items.
Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. The world is your canvas and the ground itself is your paint.
Garry's Mod is a Sandbox Game based around the idea of building. Unlike most other games there aren't any objectives - you can't lose and you definitely can't win. Doesn't work on MacOS 11.15 or higher.
- 60 alternatives to Creativerse: The Definitive Edition
Creativerse: The Definitive Edition is a sandbox adventure game set in a beautiful yet treacherous world shrouded in mystery. Adventure solo or bring your friends, unearth secrets, and tame the land together!
Terasology (started under the name Blockmania) is an open source project started by Benjamin “begla” Glatzel to research procedural terrain generation and efficient rendering techniques in Java using the LWJGL.
The Fun-Focused Free Software Voxel World Game. Voxelands is a sandbox construction game based on Minetest.Discontinued
Official website no longer exists and last commit is from a March 2018. See https://gitlab.com/voxelands/voxelands/commits/next