I either missed this when reporting on Realms of Antiquity’s release earlier this year, or else it wasn’t a thing at the time. Either way, in addition to obtaining the game directly from the developer, you will soon be able to grab a copy of it via Steam. It will run “out of the box” using the Classic99 emulator; there should be no need to wrestle with setting up TI-99 emulation for yourself.

(Hat tips: Renaak for pointing out the Steam page, Infinitron for pointing out I’d missed the release date – March 22nd).