The HTM Regiocitadis, a remarkable addition to the roster of fan-created content for Microsoft Train Simulator (MSTS) by the same devoted team behind the Rotterdam Metro Route, is a testament to their unyielding commitment to the world of virtual railway simulation. Despite the constraints of older graphics and technology, the HTM Regiocitadis brilliantly capture the essence of this unique tram-train system. They provide players with a nostalgic trip down memory lane, allowing them to savor the distinctive character and charm of the HTM Regiocitadis in the virtual world. The unfortunate loss of the platform hosting these creations raises concerns that these exceptional fan-made experiences might fade into obscurity. Preserving the HTM Regiocitadis, in addition to their other creations, is crucial to ensure that the hard work, passion, and creativity of these devoted fans remain accessible to future generations of simulation enthusiasts. These virtual simulations are a heartfelt tribute to the heritage and innovation of the HTM Regiocitadis and deserve to be celebrated and cherished.