Queen's Gate (Japanese: クイーンズゲイト, Hepburn: Kuīnzu Geito) is a series of visual combat books published by Hobby Japan. The supplement to the Queen's Blade series, it features licensed female characters from other games and works, including those from Hobby Japan. Like Queen's Blade before it, it is also compatible with Flying Buffalo's Lost Worlds gamebooks. The first gamebook, featuring Alice, was released on November 30, 2007, with a total of nineteen gamebooks released as of June 29, 2012. A novel adaptation by Eiji Okita and Eiichi Shitara was published by Kenkyusha from April to July 2009. A video game adaptation of Queen's Gate was developed by Bandai Namco Games for the PlayStation Portable and released on July 28, 2011.