If moonlight is still nvidia only, both Steam link and Parsec clients have arm ports for the raspberrypi . If neither worked without a ton of effort, Parsec is testing a web client right now which could just be loaded in a browser.Could use Moonlight to stream it from a PC perhaps?
since hollow knight has a linux port, box86 does indeed look promising.Well there are a few methods of x86 emulation available like qemu, Exagear and the new project ptitseb is working on that allows with varying degrees of success to play x86 linux software.
That being said if you were going to ask them to compile for another arch anyway, you may as well ask them to go the whole hog and compile for armhf.I doubt it, but Hollow Knight is made by a small Indie team, and seeing how open they've been with the development, they might be nice enough to make a 32bit compile
Well, they support Android with 32bit ARM, so that could be hacked somehow.If it is using Unity as stated, than we would need Unity to add ARM linux support first.