Meg's Monster is a short, story-driven JRPG set in the Underworld, a land of monsters and mutants. The game follows Roy, a hulking ogre, and his best friend Golan, who stumble upon a lost little girl named Meg. They soon discover that Meg's tears have the power to bring forth the apocalypse. To prevent this, they must help Meg find her mother and safely return home.

Players take control of Roy, who is virtually untouchable with 99,999 HP. However, the true challenge lies in protecting Meg and keeping her pacified. If Meg starts crying, it's game over for everyone. Throughout the journey, players will encounter quirky and colorful characters, with even previously defeated enemies being befriended through optional sub-events.

The game features a unique gameplay mechanic, with battles incorporating mini-games that players must master. Additionally, players can use Meg's favorite toys to keep her calm. The pixel art aesthetic adds charm to the game, making even the scary monsters look cute.

What starts as a simple and heartwarming story about two unlikely friends evolves into something much greater as Roy and Meg uncover the mysteries of the Underworld and themselves. Meg's Monster offers an emotional journey that will leave a lasting impact on players.