Undertale offers an exciting story revolving around the child of a human who has fallen in the area of underground separated by a magic barrier underneath the surface of the Earth. The objective of the player is to navigate the environment, encounter lots of monsters, complete complex quests and find to way to return to the surface of the Earth. Avoid monsters attack and uses melee weapons and attacks to slaughter them. The outcomes of the game based on the decision, action, characters and dialogue. The game uses top-down perspective and incorporates Role-playing elements. The underground world consists of caves and towns, and the player must explore the world, solve complex puzzles, ad complete different objectives to progress through the story. The player equips with a red heart which introduces his soul. Navigate Environment, Bosses, Encounter Monsters, Level-up, etc. are prominent features of the game.