Level Age ni Sugoku Choudoii Shima is a simulator game published by KONAMI for iOS, Android and web browsers. Level Age ni Choudoii Shima, developed by kagaya, is the original work and is an expanded game.
Currently, the original work is no longer available.

The purpose of the game is to create islands to beat the Final Boss, and to level up characters and train and synthesize companion monsters on the islands.