This pixel-art simulation blends castle building with tower defense. Dig rooms, place statues to boost magic, and attract monsters. Research traps like sleeping gas, rolling boulders, and water pools, chaining them strategically. Send monsters to explore dungeons and towns for resources. Randomized adventurer invasions keep every defense fresh.

Raise the little yellow dragon early for excellent food compatibility. Mid-game, prioritize magic monsters like the nine-tailed fox. Upgrade arrow traps to level ten to unlock rolling boulders, the strongest area-damage trap. Build large ten-unit rooms to handle massive adventurer waves. Upgrade recovery springs to earn more monster points.

You play as the Demon Lord, rebuilding a ruined castle into a fearsome fortress. Recruit over fifty monsters, raise them with gifts and feed, then fuse them to unlock three hundred evolution forms. Design maze-like layouts, set traps, and repel invading adventurers to earn your five-star demon castle.