Gamebox

Gamebox is a free and open source sandbox game centered on user generated content. You decide what you want to play, be it in 3D or 2D, single-player or multiplayer, or create and upload your own games. Features and content: * Included are two very basic games in 3D and 2D featuring basic physics to demonstrate how Gamebox can load games * Single-player and multiplayer games created by the community available in the Steam Workshop * Create and upload your own games to the Workshop (read the Help...