Undertale.

Undertale is a role-playing video game developed and published by indie developer Toby 'Radiation' Fox. It was released in 2015 for Windows and later for other platforms. The game is set in the underground world of monsters, where the player controls a human child who has fallen into this world and must navigate through various challenges and obstacles to find their way back to the surface. The gameplay is centered around turn-based combat, but with a unique twist where the player's choices in battles and interactions with other characters have a significant impact on the outcome of the story. The game is widely acclaimed for its engaging storyline, charming characters, humor, and its soundtrack. Undertale has won multiple awards and has become a beloved classic in the gaming community.