The main goal of this seminar is to give a brief introduction to the development of 3D videogames and the Unity 3D framework. The Unity 3D is a widely used framework for developing 3D applications. It supports a wide variety of platforms, from mobile platforms to video game platforms. The seminar aims to teach the basis of this technology. In order to reach the goal the seminar, we will develop a simple game. We will use that game to introduce some of the Unity 3D framework elements.