This is a role-playing plot game in which the player controls a human being who falls into an underground monster world, and the player must find the way out.
In order to understand the morality, personality and conflicts conveyed by the Undertale game, players must understand the hopes and dreams of the monsters. Different monsters will discuss other monsters in front of you, so when I meet a monster, I have to really understand him. Most of the main monster characters are very full, and the personality in different dialogue scenes and story branches is very consistent. This makes it difficult for me to attack them with my heart - this is what the game wants to convey.