With modern video games taking years to develop, the notion of creating one in around a month is pretty remarkable – even if it is for hardware that's over 30 years old.
That's precisely what indie dev Kakoeimon has done; Under the Shrine of Death was made in just four weeks as part of Retro Platform Jam #6. It's a turn-based roguelike dungeon crawler for the Mega Drive, created using a combination of SGDK, Stable Diffusion, Furnace and Aseprite.
Each turn, you're given four action points to use. Actions such as moving and attacking consume a single Action Point. Even though there are items such as bows and arrows, you can't use them – a consequence of the game's massively truncated development time.