The development of computer games is challenging. When developing mobile games, this process is slightly more difficult. We need to develop the same game for several different mobile platforms separately. However, we have tools that allow cross-platform game development. This tools enable us to write a game in one programming language and it can be run on multiple mobile platforms. In this thesis, we take a closer look at the architecture and functionalities of MonoGame framework for the cross-platform mobile game development. We focus on three major mobile platforms – Android, iOS, and Windows Phone. We present a number of techniques, how to solve the diversity of mobile platforms within a common codebase. Next we look into the Content Pipeline that eases work with game assets. At the end, we develop two (2D and 3D) demo games to display functionalities of MonoGame framework on Android and Windows Phone. MonoGame framework facilitates the development of cross-platform mobile games.