History VideoGame / Osu

Besides the ''Ouendan/EBA'' gameplay, ''osu!'' includes three additional game modes: one based on the ''VideoGame/TaikoNoTatsujin'' series, one based around the gameplay of ''[[VideoGame/{{beatmania}} beatmania IIDX]] [=/=] VideoGame/{{O2jam}}'' and one based around the gameplay of ''VideoGame/EZ2DJ''[='=]s [=EZ2Catch=] mode (where one tries to catch falling fruit).

It has an official remake [[WorkingTitle codenamed]] ''osu!lazer'', which will be released as an update to the stable client. It is rebuilt from ground up using [[https://github.com/ppy/osu-framework a new framework]] that improves visuals, performance, and flexibility for future changes. It also has a new UI design and new quality-of-life features not present in the stable client. It is currently under heavy development, and currently available for Windows, Platform/MacOS, Linux, Android, and iOS.

Its website can be found [[https://osu.ppy.sh/ here]], ''osu!stable'' can be downloaded [[http://osu.ppy.sh/p/download here]], and ''osu!lazer'' can be found and downloaded [[https://github.com/ppy/osu here]].

* AllLowercaseLetters: The game is called ''osu!'', not ''Osu!'' nor ''OSU!''

** On mapping side, it's HEAVILY discouraged nowadays, and maps with it have a very low chance of being ranked. Using solely tricks like low (or high) Approach Rate, high HP drain, etc., are no longer acceptable in the Ranked Beatmaps section. In addition, some very specific mapping techniques are not allowed to be ranked due to being very confusing and frustrating for players. A list of these can be found [[https://osu.ppy.sh/wiki/en/Mapping_techniques/Unrankable here]]

* OneHitPointWonder: The following modifiers do not increase score, and considered to be convenience modifiers for players who are going for a (perfect) full combo run to quickly restart the beatmap:
** 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.

* PinballScoring: In standard mode, the maximum possible score of very long beatmaps with huge note counts can grow to very large numbers. In one extreme example, the very long "[[https://osu.ppy.sh/s/29157 Within Temptation - The Unforgiving]] described in MarathonLevel above has 10-digit scores in the top four ranks (as of this edit). To get good scores in any given map, getting a full combo is crucial. Tournaments instead use the "scorev2" system with a maximum 1,000,000 points and avert this trope.

* UnwinnableJokeGame: Several maps, such as [[https://osu.ppy.sh/beatmapsets/150945 "Centipede" (Knife Party)]], are designed to be impossible for human players to full combo on, lest earn a "B" rank, with multiple circles to hit at the exact same time. Not that it means [[SugarWiki/VisualEffectsOfAwesome the mentioned map isn't pretty to look at]].

''osu!'' is a {{freeware|Game}} {{rhythm game}} made by Dean "peppy" Herbert, based on the gameplay of the ''[[VideoGame/OsuTatakaeOuendan Ouendan]]'' and ''VideoGame/EliteBeatAgents'' [[VideoGame/InisDSRhythmGames series]] of games for the [[UsefulNotes/NintendoDS DS]].

It has an official remake [[WorkingTitle codenamed]] ''osu!lazer'', which will be released as an update to the stable client. It is rebuilt from ground up using [[https://github.com/ppy/osu-framework a new framework]] that improves visuals, performance, and flexibility for future changes. It also has a new UI design and new quality-of-life features not present in the stable client. It is currently under heavy development, and currently available for Windows, UsefulNotes/MacOS, Linux, Android, and iOS.

* NintendoHard: Thought ''VideoGame/EliteBeatAgents'' and ''VideoGame/OsuTatakaeOuendan'' were hard? You haven't seen anything yet. The hardest songs from Ouendan/EBA are approximately 3.5 stars on the revised star rating scale released in mid-2014 (the difficulty range that would be considered appropriate for an average osu! player is 4-5 stars, by the way.), and these games are already Nintendo Hard on their own. The hardest songs on Osu takes this up to eleven, with revised star rating exceeding 7 stars, such as [[http://osu.ppy.sh/s/24313 "Can't Defeat Airman"]]. Such crazy streams and jumps do not exist in the original Ouendan/EBA games. Certain maps can even have 10 to 11 stars.
** 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=])". (Though that one is meant to be played by four players simultaneously.)
** Prior to the mid-2014 update of difficulty calculation system, original star rating scale could not keep up with the escalating difficulty of the newer beatmaps with topped off at 5 stars.
*** There are the few maps that completely break the old star rating system, such as 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.
** For osu!mania 4-key, there are some maps that, while they would only be maybe a 6 star map in osu!mania, they could go up to 20-footers in Stepmania (like That Was Too Slow [4K MX] or miracle 5ympho X [Black Another]). An 8.5-star map might be around a 26-footer ''or harder'', something like Kinetic or UKF Dubstep VIP in Stepmania.

* EasierThanEasy: Some maps like [[https://osu.ppy.sh/beatmapsets/325158#osu/741477 this]] to add difficulties that aren't even 1 star.

* EasierThanEasy: Some maps like [[this https://osu.ppy.sh/beatmapsets/325158#osu/741477]] to add difficulties that aren't even 1 star.

* RidiculouslyDifficultRoute: On osu!taiko, turning on the ''Hidden'' and ''Flashlight'' mods makes '''all''' of the notes unable too be seen. There's a reason you only really see this combination being used in only 1-2* maps.

* RhythmGame

Tropes for ''The OT Book'', a collaborative fiction project started in the forums of the game can be found [[Literature/TheOTBook here]].

* NintendoHard: Thought ''VideoGame/EliteBeatAgents'' and ''VideoGame/OsuTatakaeOuendan'' were hard? You haven't seen anything yet. The hardest songs from Ouendan/EBA are approximately 3.5 stars on the revised star rating scale released in mid-2014 (the difficulty range that would be considered average is 4-5 stars, by the way.), and these games are already Nintendo Hard on their own. The hardest songs on Osu takes this up to eleven, with revised star rating exceeding 7 stars, such as [[http://osu.ppy.sh/s/24313 "Can't Defeat Airman"]]. Such crazy streams and jumps do not exist in the original Ouendan/EBA games. Certain maps can even have 10 to 11 stars.

* NintendoHard: Thought ''VideoGame/EliteBeatAgents'' and ''VideoGame/OsuTatakaeOuendan'' were hard? You haven't seen anything yet. The hardest songs from Ouendan/EBA are approximately 3.5 stars on the revised star rating scale released in mid-2014, and these games are already Nintendo Hard on their own. The hardest songs on Osu takes this up to eleven, with revised star rating exceeding 7 stars, such as [[http://osu.ppy.sh/s/24313 "Can't Defeat Airman"]]. Such crazy streams and jumps do not exist in the original Ouendan/EBA games. Certain maps can even have 10 to 11 stars.

* ExcitedShowTitle