Mirror’s Edge-style gameplay (specifically first person) for experiencing Spider-man’s first few weeks of having powers, including the time prior to having built the web-shooters. I have wanted this ever since the teaser trailer for the first Andrew Garfield movie.
This is so close to what I'd want, which is basically this + somewhat accurate recreations of real life places.
Imaginary places would work too, but the main thing I'd like is to have more maps to explore than I can deal with. I could spend hours just exploring and goofing around