This is my bachelor thesis, with the goal to use game technologies, such as powerful 3d game engines, to procedur- ally generate highly appealing and strongly immersive 3d environments based upon real map data. It aims to use map data provided from OpenStreetMap within Unity to create a visually pleas- ing scene. For this, the map layout should have a visible influence on the environ- ment and keep streets and other landmarks recognisable. It is not meant to be a visual representation of the map, but rather an interpretation of it. This leads to procedurally generated parallel worlds, which are anchored in reality and could be used for location-based games. This project consists of the conception of the environment, the production of the assets needed as well as the implementation into a self-written Unity prototype.