Undertale

Synopsis

Undertale is set in the Underground, a realm where monsters were banished after war broke out with humans. The Underground is sealed from the surface by a magic barrier with a singular gap at Mount Ebott. A human child falls into the Underground and encounters Flowey, a sentient flower who teaches the player the game's mechanics and encourages them to raise their "LV", or "LOVE", by gaining "EXP" through killing monsters.