You can download Undertale for Windows, OS X, and Linux. You can use four attacks to inflict damage on the monster: attack with a wimpy attack, regular attack, an item, or a special attack. When the player encounters a monster, he/she can choose to battle it in a turn-based battle. Talking to some NPCs will make them disappear and yield EXP and gold. Talking to NPCs yields dialogue trees, where the player can choose from a list of dialogue options. You explore the Underground by walking, running, or jumping. The player can explore the Underground, talk to NPCs, battle monsters, and interact with objects. Sounds interesting, then Undertale free download for PC is for you! They must navigate the monster world and find their way back home. A human child falls into the world and is rescued by a friendly monster. The game is set in a world where humans are ruled by monsters. In order to progress through the Undertale free game, the player needs to explore the Underground, battle the monsters and make choices that will either lead to the game's 'True Pacifist' ending or its 'Genocide' ending. The player controls a human child who has fallen into the Underground, a large, secluded region inhabited by monsters. Undertale is a role-playing video game by indie developer Toby Fox.