Age is an academic game engine developed in the Visitlab/HCI laboratory. Its purpose is to provide a software foundation and playground for game development courses. The aim of the thesis is to extend the capabilities of the engine to support various new platforms. These will include Android OS as well as support for XR devices, with focus on head-mounted displays (HMD). The XR support will primarily include both tethered PCVR headsets (e.g. Valve Index, HTC Vive, WMR) as well as standalone (Android-based) headsets (e.g. Meta Quest, Pico). Student will be required to adapt existing engine architecture for diverse set of new input methods (like touchscreen, VR controllers), that these platforms will bring. The student will further investigate solutions in contemporary game engines (such as Unreal Engine, Unity, and Godot), design and implement an appropriate solution into Age, based on the gathered knowledge. The solution must further comprise tutorial(s), demonstrating the usage of the module and corresponding hardware in relation to the engine, and also benchmark(s), showing the performance and efficiency of the implementation. The results from evaluation of benchmarks will be presented in the text.