(stylized as beatmaniaIIDX) is an arcade music video game developed by Bemani and published by Konami. It was released in Japan on February 26, 1999. The objective is to perform songs using a controller with seven keys and a turntable. After the surprise success of Beatmania, Benami conceived IIDX to simulate an actual disc jockey (DJ) live performance. Its arcade cabinet contains a widescreen monitor, speakers, and eight spotlights. Bemani later developed several updated versions of IIDX to increased success. The game retrospectively received a positive reception from video game publications for its gameplay and increased difficulty. A sequel, Beatmania III, was released in 2000. Gameplay The objective of Beatmania IIDX is to perform songs using a controller with seven key buttons and a scratchable turntable. Hitting notes with accurate timing increases the player's score and groove gauge bar, allowing the player to finish the stage. Failing to do so depletes the gauge and can prematurely end the song. IIDX has four play modes: 4 Keys, 5 Keys, 7 Keys, and Expert. The controls in the 4 Keys mode are limited to only the white buttons. 5 Keys is a mode where the player uses "3 white keys on bottom and 2 black keys on top" like in Beatmania. The 7 Keys mode utilizes all buttons and Expert has the player select a course and obtain the highest score. Clearing four or more stages in Internet Ranking results in a password, which can be submitted to Konami so that the player's score is registered and shown in worldwide rankings. Development and release In 1997, Konami distributed its Games & Music Division's (G.M.D.) Beatmania in Japan as an arcade DJ simulator, significantly influencing rhythm games. Its surprise success prompted the developer to rename itself Bemani, a portmanteau of the game's title. The studio made more music-themed video games following its release, including Pop'n Music and Dance Dance Revolution. Bemani conceived Beatmania IIDX as a sequel to Beatmania. It was designed to simulate the experience of a DJ performing songs live at a music venue which gave it a "club Visual Jockey feel." The game was released on February 26, 1999. While its predecessor used five keys, the IIDX controller had seven. The controller was one of components used in the game's Benami Twinkle cabinet, along with a large 40-inch widescreen monitor, large speakers, eight spotlights, and the Effect Fader (located in