you know how there was demoscene in the 90s in the west? Aside from weird doujin games there were literally disks they sold at comiket and the like that featured PC-98 "scene music", bbses, and whatnot in the 90s sharing PC-98 music files.
Unfortunately the DOS gamedev scene overall (PC-98 and regular DOS) has been kind of flat unfortunately. The last big name "homebrew" game for DOS was Retro City Rampage DOS, along with anything 8 bit guy made.