Puzzle-solving nurturing game: Mystery-Eating Alien Girl is an iPhone game developed by Ryoma Shinzato. In this game, players solve puzzles to provide nutrition to a girl. As the puzzles are solved, the girl evolves and her appearance changes. The game is completely free to play, and there is a feature available to view hints and answers in case players get stuck.

In the morning, you wake up to find a strange object in your room. Next to the object, which looks like an egg, there is a letter. The letter states, "My name is Eiri, a girl. When you solve puzzles, I absorb inspiration power and evolve. Please take care of me." As you stand there confused, the girl's face pops out of the egg. Reluctantly, you start solving puzzles for the sake of the girl.