OMSI 2, or Open MultiSimulation Interface 2, is a popular simulation software used for creating and playing bus driving simulations. One of the most exciting aspects of OMSI 2 is the ability to add custom content, such as buses, routes, and scenery, through add-ons. In this essay, we will explore one such add-on, the Doppelgelenkbus AGG 300, and discuss its features, benefits, and availability.