Dummied Out / Rhythm Games

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• An odd case can be found on the PSX version of beatmania Best Hits. Dummy data appears to have been added to the disc, which is actually a common practice to force the data that will be used to sit on the outer edges of the CD track, where it will read faster. The oddity is that the dummy data contains the source code and developers' memos detailing things like the scoring algorithm.
  • The arcade hard drive for beatmania IIDX 15 DJ Troopers contains a few unused textures for an English localisation of the game (the previous version Gold actually did have a U.S. location test build, but it went unreleased, and it wasn't until IIDX 27 that English would become an officially-supported language in-game. Some of the textures from this particular build were also found as well).
  • beatmania IIDX 20 tricoro had incomplete data for several songs that would later be included in IIDX 21... with the exception of "masquerade" from Popn Music, which was never added to any subsequent version of the game. Fans have theorized that this was due to TËЯRA's departure from Konami after IIDX 20's release.
• DanceDanceRevolution: Various random assets, including unused materials for cut songs and other oddities, have been found hidden in the data of various DDR games:
  • DDR Extreme US was apparently a little rushed. Every DDR home game has a "dance mode" that disables accidental shape button presses on dance pads. DDR Extreme has the setting, but you'll need to hack a save file to take advantage of it because the setting isn't in the options menu. The same issue exists in the European Dancing Stage Fusion and Japanese DDR Festival, both of which base their engine on the US DDR Extreme.
  • The Japanese PSX port of DDR 3rd Mix had some data for songs that in the arcade version but were removed from the console version (ostensibly due to the music licensing not getting sorted out in time, since the missing songs were in the JP PSX version of DDR 4th Mix).
  • DDR Solo 2000 contained some assets for a European localisation under the Dancing Stage brand.
  • At least one PS2 DDR release had the Basic step data for the song "Peace (^^)v" on the disk but not the song itself.
  • The US arcade version of Dance Dance Revolution SuperNOVA had an unfortunate case of dummying out too much. The Japanese version supported Konami's online platform e-Amusement, which is used for saving player records using a card system, online leaderboards, and downloading updates and new content. SuperNOVA had four secret songs, Fascination MAXX, Fascination -eternal love mix-, Healing-D-Vision, and CHAOS, which could only be played on Extra Stage or One More Extra Stage, and only on Expert difficulty. Previous DDR games had a secret code that could be entered in the operator menu to unlock these songs, and Konami would release the codes a couple months after the game's release. However, SuperNOVA was the first DDR game after e-Amusement rolled out, so Konami had planned to simply release an update patch to enable the secret songs. Unfortunately, when all e-Amusement code was dummied out in the US version, the only way of unlocking the secret songs was dummied out as well, leaving them permanently inaccessible. On the international versions of SuperNOVA 2, these issues were rectified by adding unlock codes that could be entered on the pad by players on the title screen (a la In the Groove), and an attempt to beta test e-Amusement in America. Although e-Amusement would not come to DDR in the U.S. until the international launch of DDR A, they still used codes on X and X2.
  • Extreme had a glitch in Nonstop mode known as the "Oni gitch"; the song list for each course animated in and out when users scrolled through courses. However, it was found that if the Start button was hit before the song list transitioned in for the new course, it would load the songs correctly but with the difficulties from the previous course. This exposed dummied out charts on several songs that are not normally accessible in gameplay, including "Last Message", which is mostly blank (besides a random stream of left and right notes at the end of the first chorus, followed by a part consisting only of left arrows), and "Dam Dariam", which looked like a complete chart, except that it didn't appear to match up with "Dam Dariram". Turns out that the the steps of the "Dam Dariram" chart actually matched up with the Captain Jack song "Give It Up", which was supposed to appear in Extreme but didn't make it even in the beta test.
  • The 2013-2016 version (known simply as Dance Dance Revolution) was supposed to have removed the Encore Extra Stage, but it was briefly accessible through a glitch (patched about a week later), demonstrating that it was merely dummied out by removing the "this song can be used on Extra Stage to earn Encore Extra Stage" flag from all songs.
  • Infamously, "Memories" was long thought to be dummied out in DDR Extreme US because nobody knew how to unlock it for a long time, even though hacking the game revealed that the song very much exists (full stepcharts, audio, background and all), and the common folk can probably guess its existence through a "bug" that prevents you from achieving a notification that you've cleared all stepcharts in the game sans Challenge ("Memories" doesn't have a Challenge chart, so the notification can show even if you don't unlock it). The song is actually a legitimate unlockable, as part of a Burger King promotion held two years after the game was released.
• The first DJ Hero had three mixes removed from the game for unknown reasons. One was unfinished, but the other two were very good, including a Ludacris vs. Red Hot Chili Peppers mashup.
• Guitar Hero:
  • The first Guitar Hero features two obscure bonus songs that can only be played through hacking. They're some of the toughest in the game. Interestingly enough, one of those songs, Trippolette, is now available for download on the Rock Band Network. It's one of the toughest in the game.
  • The initial release of Guitar Hero III had Co-op Career mode as the only way to play co-op, but still included bass charts (accessible in practice mode) for songs that are not part of the Co-op Career setlist. An update for the Xbox 360 version added a Quickplay Career mode, presumably making use of those bass charts. Those bass charts were still accessible normally; once a Co-Op Career was completed, the songs not included in the tier progression would be unlocked (with the exception of "Paint It Black", which had the guitar and bass on the same audio master track, and was thus unavailable for multiplayer). Nonetheless, Co-Op Quickplay was invaluable for getting around some of the unnecessary restrictions of Co-Op Career.
  • Although the Guitar Hero 2 Demo had only 10 playable songs, it was found that there were actually around 30 beta charts of songs on the disk that could be retrieved through hacking. Some of the note charts were very different
  • Also of note is that the song "(Bang Your Head) Metal Health" by Quiet Riot, which later appeared in Guitar Hero Encore: Rocks The 80's, is in the files for the demo as well, and the version on the demo includes a solo that was taken out of the GH80's version to make it fit its first tier ranking after I Want Candy was removed from the game and Because It's Midnite was moved out of its previous bonus song slot. See the song here.
• At least two songs were planned but removed from Hatsune Miku: Project Mirai DX: "StargazeR" and "Change Me". A logo for the former exists within the game's data, while the latter has an unused but relatively complete model of a stage.
• All of the games in the Rhythm Heaven franchise have leftover content. Most notably, Megamix has redrawn art assets for alternate versions of games that don't actually appear in Megamix (such as the electric fish from Tengoku's Night Walk 2, the small robots from Heaven's Fillbots 2, and the demonic-looking quiz master from the Endless version of Quiz Show) and, of all things, the audio track from Fever's Remix 10.
  • Rhythm Tengoku and Rhythm Heaven Fever have two unused minigames; Tanooki & Monkey and Seika^note Japanese for "Fruit and vegetable" Relay, respectively. While the former is playable, trying to play Seika Relay will always break in one way or another.

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