The bad humans are invading the mysterious forest! The slime kingdoms in the forest are facing a tremendous crisis! As a slime chosen by the Slime Sage, you can enhance your abilities through battles, collect legendary equipment, utilize powerful skills, defeat waves of terrifying enemies, and safeguard the peace of the forest. Once you are defeated, come back stronger! Slime Castle is a role-playing idle tower defense game. Players could enjoy an excellent role development system, countless powerful weapons, and several impressive battle scenes.