Rigs of Rods (also known as RoR), is a truck, car, airplane and boat simulator. You can drive, fly or sail in total freedom in an open environment.What makes RoR different to most simulators is its unique soft-body physics:
vehicles chassis and wheels are simulated in real-time as flexible objects,
giving the simulation an extremely accurate behavior, while allowing the
vehicles to be simply specified by their structural composition, as a network of
interconnected nodes (forming the chassis and the wheels).