They can opt to pacify or subdue monsters in order to spare them instead of killing them. The combat system involves the player navigating through mini- bullet hell attacks by the opponent. The player meets various monsters during the journey back to the surface, although some monsters might engage the player in a fight. The player controls a child named Frisk who has fallen into the Underground: a large, secluded region under the surface of the Earth, separated by a magical barrier. Undertale is a 2015 2D role-playing video game created by American indie developer Toby Fox.