MECHANICA A Ballad of the Rabbit and Mercury— is a role-playing game in the cyberpunk genre, a time loop and riddles, developed by the Japanese indie studio Losers, published by OTAKU Plan. All characters in this game are over 18 years old. Prehistory of the history of 5029 AD, the Guillotine, the Japanese territory on Mercury, a city full of neon signs and drunks. Under the cover of the sky that hides the sun, the Guillotine is a world inaccessible even to the light of the stars. The whole world on Mercury will be destroyed every three days, in such a hopeless situation, the protagonist and a mechanical maid with rabbit ears are fighting, in search of the truth of what happened.