This Application does include 2 Scenes of Falcon9 Landing Simulations. These Landings are entirley physics based. The Falcon9's implementations does include Grid-Fins, Gas-Thrusters and a gimbal Engine that are PID regulated.
Additionally, there is a Playground where you can control a falcon9 rocket with your joysticks. The controls are as following.
Right Trigger - Fire Engines Left Trigger - Deploy Legs