The main character in "Limbo" is a nameless boy, who awakens in the middle of a forest on the "edge of hell." While seeking his missing sister, he encounters characters, who either attack him, run away, or are dead. Along the journey, the forest eventually gives way to a crumbling city environment.
Did You Know? In one of many unofficial theory, every obstacle in "Limbo" represents a fear of the boy. As he progresses to find his sister, he faces his fear of drowning, darkness, spiders, bullies, being powerless (Mind-control grubs), heights, and finally, death. He finds his sister burying his body. However, he overcomes it all and reunites himself with his sister, in heaven.