Tinybox

A multiplayer 3D brick-building physics sandbox with a world editor, gamemodes, online servers, various weapons, vehicles, contraptions, character customization and more! Open-source under the GNU Affero GPLv3 - see source code at https://github.com/caelan-douglas/tinybox. No account creation necessary for multiplayer.

Create custom worlds in the world editor, upload them to the World Browser and load them in official servers. Build vehicles, catapults, ferris wheels and other contraptions and then put them to the test in gamemodes like Deathmatch, Hide and Seek, One vs All, or just have fun in the sandbox mode.

Tinybox is an open-ended multiplayer physics sandbox where you can make (and destroy) whatever you want!