These are new engines rather than wrappers: bring a GOG or Steam copy of the original and they render it through Metal, Vulkan or Direct3D 12 with shadows, ambient occlusion and FSR upscaling, and run the flight model at up to 240 Hz. The part that took the real work is the sound — the adaptive iMUSE soundtrack from the 1995 Collector’s CD-ROM, reimplemented rather than recorded.