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Video Game: osu!

osu! is a freeware rhythm game made by Dean "peppy" Herbert, based on the gameplay of the Ouendan and Elite Beat Agents series of games for the DS.

Game levels, called beatmaps, are created and submitted by users via a Level Editor, refined through community modding and ultimately approved by members of the Modding Assistance and Beatmap Appreciation Teams.

Besides the Ouendan/EBA gameplay, osu! includes three additional game modes: one based on the Taiko no Tatsujin series, one based around the gameplay of beatmania IIDX / O2jam and another revolving around catching fruit. Players can compete in all four modes in online multiplayer matches.

Its website can be found here and the game can be downloaded here.


This game provides examples of:

  • Anime Theme Songs: Around 1/3 of all the ranked maps are these.
  • April Fools' Day: The jokes each year revolve around changes in the game's genre ("Touhosu", a Touhou/osu! hybrid), gameplay ("osu!core", where the songs in every beatmap had their pitch and speed increased), staff (unexpected demotions or promotions) and beatmaps (pretending to approve and praise an extremely poorly made beatmap
    • Also, some of those jokes have ascended. osu!core became a permanent available mod called Nightcore, and Touhosu! has been confirmed as in development by peppy.
  • Call a Hit Point a "Smeerp": The currency of this game is called "kudosu", and is earned through modding unranked maps.
  • Cross Over: The beatmap for Queen's Don't Stop Me Now is based on the plot of a Fan Fic which combines Phoenix Wright with Elite Beat Agents. It's as awesome as it sounds.
  • Determinator: A player can become this if they're trying to pass, get an FC (Full Combo), or enter the Top 50 on a beatmap, especially if the beatmap is pretty difficult. If they lose a rank in the top 50, don't expect them to quit playing for hours until they beat the player who beat their score.
  • Fun with Acronyms: MAT (Modding Assistance Team), BAT (Beatmap Appreciation Team) and, until its merging into the BAT, GMT (Global Moderator Team).
  • Game Within a Game: Taiko and Catch The Beat modes.
    • And now osu!mania.
  • Grade Inflation: As in Ouendan and EBA, S comes after A, but a perfect performance in osu! earns the player an SS rank. An SS achieved under the Hidden and/or Flashlight mods has a separate sprite (alternate colouration in the official skin) and commonly referred to as "SSH".
  • Idiosyncratic Difficulty Levels: A lot beatmaps do this.
  • Harder Than Hard: Many beatmaps have an Insane difficulty, and some even have a difficulty above Insane.
    • "Oni" and "Inner Oni" respectively for Taiko beatmaps.
  • Interface Screw: The Hidden and Flashlight mods.
  • Level Editor
  • Mascot: Pippi.
  • Marathon Level: There are a handful of "marathon" beatmaps, commonly ranging between 10-15 minutes in length, with some even longer:
    • paraparaMAX I, at 36:17.
    • Within Temptation's entire album The Unforgiving in one beatmap, the current record holder at 52:57.
    • In addition, there are several unranked maps that pass the 100 minutes mark, also some of them are over Insanely difficult!
  • Nintendo Hard: Thought Elite Beat Agents and Osu! Tatakae! Ouendan were hard? You haven't seen anything yet.
    • This especially applies for the beatmaps with >=4.95 Star Difficulty. And approval beatmaps with crazy streams/jumps. An example is this beatmap, based from "Can't Defeat Airman". It's a thing of the past, though; there's a new star difficulty calculation system as of March 2014.
      • A common joke between pro players (rank 1000 or less) is saying they have problems passing "Can't Defeat Airman", there are a few beatmaps where almost all players have to struggle, such as "xi - FREEDOM DiVE (FOUR DIMENSIONS)", or "IOSYS - Utage wa Eien ni ~SHD~ (TAG4)".
      • And then there are the few maps that completely break the star rating system, such as the already mentioned xi - FREEDOM DiVE, where the hardest difficulty is rated at around 2.5 stars, which is the average Easy difficulty rating, and the other, also insane+ difficulty is rated at 4.5, which is a typical Hard difficulty. Certain maps with high difficulty settings go ABOVE the 5.00 limit(although not by much).
      • Adding on, there are several joke maps with star ratings into the negative and beyond, even reaching up to -infinity/5 in some weird special cases.
    • Elaborating on the new calculaton system above: Anything that goes up to 3.5 stars (which is declared by the system as an Expert diff, symbolized with a purple star and an X letter in the middle of it) can be considered this, but some Insane diffs (2.5-3.49 stars, with a red star and an I letter), especially the ones on the higher scale can also be Nintendo Hard.
  • One-Hit-Point Wonder: In the Sudden Death mod, you fail the beatmap you're currently playing if you screw up once.
    • With the "Perfect" mod, you lose instantly if your accuracy goes below 100% at any point.
  • Positive Discrimination: One reason is that Cookiezi, one of the top osu! players, is Korean.
    • In fact, even after he quit osu in May, he still was on top of the leaderboards until early September.
      • When he came back later during 2012, it took him about a week to recover the first place position.
  • Rage Quit: A common practice to avoid submitting and saving low accuracy scores.
  • Rhythm Game
  • Scoring Points: There are two scoring systems: the "PointValue x (combo + ConstantA) x (ConstantB)" system used in the source games, and the "pp" system (each map gives you a certain amount of pp if your performance is better than what was expected according to your current Overall pp Rank). There are also scoring system that are exclusive for multiplayer matches, such as accuracy (percent-based system, which is the average accuracy for each note, being a 300 a 100%, a 100 a 33.33%, a 50 a 16.66% and a MISS a 0%), and Combo (the player with the biggest combo the moment the map ends wins). In a multiplayer match, you can choose which system to use for ranking.
  • Self-Imposed Challenge: Using one or more of the difficulty increasing mods and/or going for SS (perfect) runs.
  • Stylistic Suck: NotShinta's cover of Imogen Heap's Aha! is awful. Yet so very good. Notable for being the beatmap with the lowest user rating on the site.
    • The Jarto series is based on this trope, having an... odd narrative told through Stylistic Suck storyboards.
    • Spinsmith also has his series of bad song covers.
    • ztrout is like Aha?, except it came first.
  • Super-Deformed: Miniature versions of Pippi, Ryuuta, and J can be found on the homepage and Catch The Beat.

Elite Beat AgentsRhythm GamePara Para Paradise
Frets On FireFreeware GamesStepMania

alternative title(s): Osu
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