Illusion on 27 December 2020
Given that this thread was made in Feb 2019, isn't it pretty obvious that this title was MP4? I mean, that big reveal that Retro Studios was back on the project was made right around this time, if I recall correctly.
As for my wish: I would have loved for this to have been Earthbound 64. It's a real shame because it probably would have only taken a few months of development time to finish whatever needed to be done on that title using modern technology.
