In the ESRB rating system, Adults Only 18+ games are designed only for adults 18 years and over. No one under that age is allowed to purchase such a game under any circumstance. Such games may include prolonged scenes of graphic/intense violence, strong sexual content and/or gambling with real currency.
So far, there have only been 29 games with an AO rating, and because Sony, Nintendo, and Microsoft will not allow AO-rated games on their consoles, production is limited to games for the PC/Mac.
Video Game StudiosEdit
Destructive Creations (Hatred)
Hangar 13 (Mafia III)
Koei Tecmo Holdings Co., Ltd. (Ninja Gaiden 3: Razor's Edge)
Manga Gamer (ef-a fairy tale of the two)
Rockstar Games (GTA: San Andreas, GTA 5, Manhunt 2)
Warner Bros. Interactive Entertainment (Dying Light)