Good Bad Bugs/Video Games/Rhythm Game


 * The DDR Extreme arcade cabinet had a difficult-to-time trick in Oni mode. When switching between courses, the song list shuffled off the screen and is replaced by the new one. By pressing the start button in the middle of this animation, the cabinet may accidentally load the correct songs for the course, but load the difficulties from the previous one. Most combinations don't produce anything special—either a crash and reboot of the machine or Heavy step charts mislabeled as Challenge—but a few courses reveal Challenge-difficulty step charts that were Dummied Out and are not playable through any legitimate means.
 * Due to the way DJMAX Technika's touch screen handles touches, you can do tap notes by dragging your finger across them, and conversely, you can do chain notes by individually tapping each individual segment. Whether this is a legitimate way of playing the game is a matter of debate.
 * Normally after completing the first 3 stages of the Heartbeat Set, you'll get "Colour of Sorrow". However, if you get 75% MAX judgments or less, you'll instead play "Proposed, Flower, Wolf", a beginner-level song. This bug was corrected through an online update...which you don't get if you're playing in a country that doesn't have Platinum Crew support for its Technika machines.
 * StepMania 3.9 (and "3.95", the version used by In the Groove 2) has a series of bugs that allow for some serious Interface Screw. The most famous one is perhaps the "Negative BPM" bug, which can be used to create warps, which can then be used for a wide variety of effects and tricks. It has been leveraged to create crazy fan favorites.
 * Unfortunately, this bug was fixed on 4.0. However, sm-ssc (StepMania 5) turns it into an Ascended Glitch by providing built-in means to perform warps.
 * Rock Band 3, on PlayStation 3 at least: some venues have large props that the rockers sometimes stand on. There's one venue with lots of green lanterns that does not seem to have such a prop, but the game seems to think it does, so rockers will sometimes stand several feet above the stage.