Tinybox ('tiny + sandbox') is a free 3D multiplayer sandbox game focused on creativity, experimentation, and destroying your friends with rockets. Available for Windows, Mac and Linux.
Create & share
Use the world editor to create custom worlds - anything from mansions and castles, to floating islands and parkour. You can also take advantage of the physics engine to create machines and contraptions, like vehicles, catapults, traps, or weapons.
Sandbox, or not
Load your maps and creations in the public servers and experiment in sandbox mode, or play gamemodes including variants of Deathmatch, Capture, and Hide & Seek. With no player limit, bring as many friends as you want!