Geo Universal is an independently developed game created in RPG Maker 2003, by Kikiyama. Little is known about Kikiyama besides their work on Geo Universal, other than they live in Japan. The game is free to play and can be downloaded here.
The game follows a character named Geo Guy, as he travels through his surreal and often disturbing dreams. The game environment consists of Geo Guy's bedroom, balcony, and the dream world. The dream world can be accessed by laying on Geo Guy's bed, and waiting for him to fall asleep.
The main area of the game, called the "Nexus" or "Hub" by fans, consists of a small room with thirteen doors. One of them leads back to the dream version of the apartment, and twelve others lead to various other areas of the game. Each of these areas has its own themes, but several concepts carry over from one region to another. Particularly, they are disorienting, and contain either very bright or very dark color schemes.
The game was banned in 2005, due to many complaints that the players would commit suicide. Rumors say that these suicides and illness only occurred after the children playing the game reached door 12, whose theme music had extremely high frequencies, that studies showed that only children and young teens can hear, since their ears are more sensible.
Due to the strange and disturbing tone, at least two-hundred children supposedly committed suicide, and many more developed illnesses and afflictions. The children who committed suicide usually did so by hanging or jumping from heights. Those who did not acted irrationally complained of severe headaches after listening to door 12's theme......