Hero Reincarnated as Blue Slime Episode 3: Demon King Subjugation

A cave-excavation simulation where you drive ecosystem changes to harvest magical stones. As you dig through cave walls rich in magical energy, you trigger ecological reactions—slimes spawn from high-concentration areas, centipedes hunt the slimes, chickens breed or die in response—and the underground environment shifts dramatically. You command a half-beast girl to navigate these dangers and pursue your mining goals. An expanded version adds demon lords and heroes to the ecosystem simulation.