Upgrade the level of the restaurant and kitchen to level 10 to unlock the Mariana Trench.

"Dark Cooking King" is a business simulation game about monsters and food developed by OfunaGames and published by Yedao Games. The game takes a business simulation as its theme, incorporates adventure elements, and sets a restaurant as the background. Players need to search the world for monsters and monsters that can be used as ingredients for cooking, capture and raise them, and finally make dark dishes and sell them to diners. Eventually became the Dark Cooking King. The game launched a small-scale test in the App Store in Taiwan and Hong Kong on May 18, 2017.