https://store.steampowered.com/app/2380720/Sqube_Darkness/?l=japanese

Retro back to the year 1977! With the release of the Commodore PET, personal computers became accessible to masses for the first time. It only had 8K. Tower And Dragon's goal is to create a fully immersive RPG 2D gaming experience on that computer (or emulator) for the very first time.