the origanal Halo is one of my favorite games ever, just the fact that a lot of modern games today are a lot worse than this twenty year old franchise. Last month I found a video of Halo: CE working in VR without any context (video link here: https://www.youtube.com/watch?v=KsUiVxySTPs). It might be preaty hard, but the halo moding comuity is preaty large. If I were Dr Beef I would start with costom halo.