Chopped up the mesh extracted from the game's loading screen for ease of print. I've also scaled up the model size, which you can undo if desired. There is a ton of support required, but it's at least manageable. The torso is still one large print because there didn't seem to be anywhere convenient to chop the thing.
The other stl is a bit hard to fix since it was extracted from the game. What I did was set a minimum horizontal size compensation to 0.8mm (using Simplify3D as a slicer, not sure about other slicers), which filled in some of the walls that were smaller than the min printable wall size. In doing that, the mesh came out perfect! Hope that helps.