Rigs of Rods (RoR) is a free and open source[1] vehicle-simulation game which uses soft-body physics to simulate the motion destruction and deformation of vehicles.

Rigs of Rods was initially created as an off-road truck simulator, but has developed into a versatile physics sandbox game.

The mapping system uses terrain data defined in a raw image file, such as that found in a digital elevation model which can be used to form a realistic surface.

As a sandbox, Rigs of Rods has no fundamental gameplay goal, but scripting support contributes to missions and game play interaction like the timing of checkpoints along a road or dragstrips.

[7] Rigs of Rods author, Pierre-Michel Ricordel, was invited to talk about the game at the French convention, Libre Software Meeting on July 10, 2009.