next stage. Other than Mirror, many new options can be activated with step codes: Left (shifts the arrow placements to the left), Right (shifts the placement to the right), Shuffle (randomizes the placement), Hidden (arrows disappear when they are about to reach the Step Zone), and Little (eliminates all non-quarter beat steps, which will lessen the maximum score available to attain). Through step codes, two players may also select different difficulty levels while playing in Versus and Couple modes. The game removes Extra Stage and adds Step Battle, a competitive play style in which each player records a series of steps for the other player to play. Step Battle is exclusive to three songs and can only be accessed with codes. An updated version, Dance Dance Revolution 2ndMix Link Version, was released to Japanese arcades on April 28, 1999. This version came with a PlayStation memory card reader, installed in the middle of the arcade cabinet. It supports cards that have Link Data from the home version of Dance Dance Revolution, allowing each player to save high scores and play custom step edits. 2ndMix Link Version adds five new songs to the game, two from the home version and three new licenses, for a total of 37 songs. The game adds an "All Music" mode, making it the first time players can access the entire song list from the start. Future Dance Dance Revolution releases in Japan, up to and including Dance Dance Revolution Extreme, integrated Link Data functionality in-game. However, these required different home games to produce different Link Data formats: 3rdMix, 4thMix, 4thMix Plus, 5thMix and New Version. , the home version of 2ndMix, was released in Japan on April 20, 2000, for the Sony PlayStation. It includes 35 songs, 3 of which are new to this version and are hidden and unlockable. Two of the hidden songs were previews of the next arcade version, Dance Dance Revolution 3rdMix and can only be played on Basic difficulty. The home version has the ability to Disc Change to 1st and Append Club Version. It also allows to unlock features in previous mixes such as the Nonstop Ranking from 3rd Mix. The interface is still the same as the one used in 2ndMix. On April 20, 2000, Konami released a version of Dance Dance Revolution 2ndMix for the Dreamcast console. It features 47 songs, seven of which are hidden and