This paper shows which physical forces influence the driving behavior of a vehicle. Further, it explains how you can determine these forces and apply it to the rigid body of the car. The thesis considers that different ground surfaces can affect the driving behavior. This document contains a short introduction to Unity3D which explains some useful components of the physic engine. The implementation part covers how you can find realistic values for your desired car model and how you can implement the theoretical equations in a car simulation. It explains how you can create a realistic driving behavior for a buggy in the Unity3D game engine. The paper contains a software architecture that was developed for this physical con-cept with the requirement that you can easy add different car models and engine types.