Horizon Sandbox

Physics sandbox

Horizon Sandbox is a multiplayer physics sandbox for PC where you build things and test what they do. Its open-ended premise is to make anything you can imagine, using physics as part of the play.

Building and testing

You can bolt a thruster to a pallet and call it a plane, or send a friend to the stratosphere. Those examples frame the game around making contraptions and seeing what happens when you use them with other players.