Audition Online is a downloadable multiplayer online casual rhythm game produced by T3 Entertainment. It was originally released in South Korea in 2004, but it has been localized by various publishers around the world. Audition Online is free to play but it earns its revenue by selling virtual items such as clothes for the player's avatar. It currently has over 300 million players worldwide

A player is allowed to create a room or join a room. The 'DJ' (the player who creates the room) is given power to choose songs and settings for the room. The DJ also has the power to kick people out of the room and close the dance floor off. The song's BPM (beats per minute) usually will determine the song's difficulty (with certain exceptions e.g. beat up mode).

The basic game is played by pressing the arrows displayed on the screen (with the exception of red Chance arrows, which the player must do the opposite of) and pressing spacebar or the control key on every 4th beat of the song. The more accurately the spacebar or control key is pressed, the higher the score, "PERFECT" being the best. The player currently with the most points during the game will have their character in front and the most visible part of the stage.

A special move during most gameplay modes is the "Finish Move". If a person does not miss the move before it, they have the option to do the "Finish Move". Finish moves issue a lot of points and can often be the key to success.

When a player does 2 or more PERFECTs consecutively, he will get bonus points for doing so. These PERFECT combos (or "Perfect chains") enable players to interfere with the opposition. A blue circle indicates that you made a PERFECT in your move, and acts as a shield. When a player performs a PERFECT X1 (or perfect X2 in some cases) they will make either the player ahead or behind them receive a yellow circle. While under the yellow circle, points will not be given if that person does not achieve a PERFECT (in a finish move it reduces a percentage rather than the whole move). In addition, players can increase their points by playing 'chance'. This can be activated by pressing the delete key or the . key on the number pad whereby red keys appear and players have to press in the opposite direction of the red keys. At the end of the dance battle, the person with the most points is the winner. Each player will receive experience points and Den/BEATS according to what position they finished in.

If a single/group game (not including NPC, One-Two Party and Beat Up modes) is full, while also having the music set to random, a random event (also called a mission) will occur. This is where bonuses are given if you accomplish a certain challenge. Examples are not getting a specific beat judgment (e.g. no COOLs or no BADs), getting perfect combos (e.g. PERFECT X3), or getting a standing (e.g. getting number 1). The music can be random, random(new), or random from any range of tempos.

(not available in all versions)
There are chance levels from 1 till 6. With the addition of Chance levels, the DJ can now set a standard number of red (opposite keys) arrows a player will face when they use the chance mode. The choices range from 0 to 6. Alternatively, the DJ can select the free chance mode which will allow players to cycle through the levels at their leisure, or random level chance where a random amount of red chance keys appear per move (ranging from 1 to 6). The more red steps a player clears, the more points they will score. The ability to choose your own level of difficulty adds a new level of strategy and can greatly stratify scores between weak and strong players. In addition, whether or not players are using chance and their current chance level are displayed next to player scores during the game.

New Macro System (not available in all versions)
The macro system was altered to make it simple to change even for new players. The player now has the option of manually editing the file from the macro.txt document in their Audition game folder or simply by going into the messenger options and changing it through there. The new macro system also allows players to save their macros to the server's database and allow them to use them on another computer.

New Emoticons System (not available in all versions)
One of the best thing for chit-chat, the Emoticons System, has been updated in Audition Season 2. The players can now select various Emoticons to enter with chat text, by either hitting CTRL + E and pick the Emoticon manually, or use short-cut text-to-emoticon conversion (I.E ;kiss, ;win...) The text-to-emoticon conversion also affected room name and players' name, so new players can enter prefix with his/her IGN in order to display as Emoticon in Lobby / Ranking Board User List

New Dress Room System (Not available in all versions)
The newest feature in Korea Audition, allowing players to change their character's clothes without having to go to Fashion Mall. Instead, just click an Icon near ATV Icon and Clothes Wardrobe will open up. While picking new clothes, a small Dress Room shows up at the players' position and disappears after he/she made choice - new clothes are now changed! The only downside that Dress Room won't allow face changing, so players had to save faces with Costume for accessing with Dress Room

New Dress Room System (Not available in all versions)
The newest feature in Korea Audition, allowing players to change their character's clothes without having to go to Fashion Mall. Instead, just click an Icon near ATV Icon and Clothes Wardrobe will open up. After picking new clothes, a small Dress Room shows up at the players' position and disappears - new clothes are now changed!

New Big Game System (Not available in all versions)
Upgrading from the old Big Game feature, now random events are viewable and limited to "Missions" like Story Mode. Not only Normal Dance, Big Game now applies to Beat-Up, One-Two Party and Beat-Rush and the players can press F10 to see Big Game Status Screen or display Big Game Condition if occurred during the match. However, some of the Big Game Conditions are way ridiculous and close to impossible to beat (i.e 0 great, more Bads than Misses [Beat-Up]...)

FAM (not available in all versions)
A fam is a function brought along with the Fam Office. It works very similarly to guilds in other games. In order to create a fam, the creator must meet the requirements of Lv. 21 or greater, and 1,000,000 DEN/Beats (not the same on all versions). The leader may then purchase a variety of Fam Office-based items including a home, clock, notice sign, and a forum ranging in price from 100,000 DEN/Beats to 2,000,000,000 DEN/Beats. If the leader wishes, he or she may add members to the fam that would then be permitted to donate DEN/Beats, and assist in earning Fam Points.

The fam leader is given the ability to purchase a channel for gaining Fam Points (which determine the ranking of the fam). He or she may pay 100,000 DEN/Beats for 2 hours of channel time, 200,000 DEN/Beats for 4 hours, and 300,000 DEN/Beats for 6 hours. The amount of DEN/Beats and time may vary depending on the server. When creating a game in the purchased channel, any fam member will receive 1 Fam Point per person in the room, therefore a total of 6 per full room. A fam room is indicated by a green FAM icon beside the room name.

There are three classes/rankings in total: Fam Leader, indicated with a red title, Fam Mod/Secondary Owner, indicated with a blue title, and a regular member, indicated with a green title. Promotion can only be done by the fam leader.

Fam Battles are started when a leader creates a fam battle room and waits until 3 members out of two different fams enter the battle room. The team then challenges one another to a regular game, with rules set by the fam with the DJ member.

The level in audition is limited to the level 99
And their class are :
Lvl 1 - 5 : Stiffy
Lvl 6 - 10 : Novice
Lvl 11 -15 : Freedom
Lvl 16 - 20 : Clubber
Lvl 21 - 25 : Amatuer
Lvl 26 - 30 : Back Up
Lvl 31 - 35 : Main
Lvl 36 - 40 :  Pro
Lvl 41 - 45 : Master
Lvl 46 - 50 : King
Lvl 51 and above : World Star
In Korean Audition :
Lvl 51 - 60 : World Star
Lvl 61 - 65 : Audition Master
Lvl 66 - 70 : Royal Master
Lvl 71 - 75 : Speacial Master
Lvl 76 - 80 : Elite Master
Lvl 81 - 85 :Grand Master
Lvl 86 - 90 :Legendary Master
Lvl 91 - 95 : Maestro(Silver)
Lvl 96 - 99 : Maestro(Gold)

Single Modes

Practice (4 and 8-Key)
Normal Individual
Freestyle Battle
Crazy Freestyle Battle
Choreography
Expert Choreography
SYNC-8
Choreography-C (4 and 8-Direction)
Dynamic (4 and 8-Key)
Crazy Dynamic (4 and 8-Direction)
Choreography-C 9k(New mode on the Korean Audition)
Beat Rush (Normal/Crazy/Random, 4 and 8-Direction)
One-Two Party (Easy and Hard Mode)
Beat-Up Mode (4 and 6-Direction)
License Mode
Story Mode


Group Modes

Normal Group
Sync (4 and 8-Key)
Choreography-C (4 and 8-Direction)
Choreography
Choreography Free-C
B-Boy Battle (4 and 8-Key)
Couple Dance (4 and 8-Key)
Expert Couple Dance
Couple Dance 31 (4 and 8-Direction)
Dynamic (4 and 8-Key)
Night Dance (4 and 8-Direction)
Crazy Dynamic (4 and 8-Direction)
Club Dance (4 and 8-Direction)
Club Dance II (4 and 8-Direction)
Wedding Party
Love Party
Ballroom Dance (4 and 8-Key)
Special B-Boy Battle (4 and 8-Direction)
[Battles: 1:1 Lead, 2:2 Serve, 3:3 Team]
Beat-Up Team (4 and 6-Direction)
FAM Battle

Battle Party Modes

Battle Party (Single and Team, 4 and 8-Direction)
Couples Battle Party (4-Direction, Expert and 8-Direction)
Beat-Up Battle Party (4 and 6-Direction)
Union Battle Party (4-Key, 8-Key or Both)
Beat Rush Battle Party (4 and 8-Direction)

Level 1 - 0
Level 2 - 220
Level 3 - 1,260
Level 4 - 3,480
Level 5 - 7,140
Level 6 - 12,500
Level 7 - 19,695
Level 8 - 29,000
Level 9 - 40,500
Level 10 - 54,500
Level 11 - 71,000
Level 12 - 90,000
Level 13 - 112,000
Level 14 - 137,000
Level 15 - 165,000
Level 16 - 196,000
Level 17 - 230,500
Level 18 - 268,500
Level 19 - 310,000
Level 20 - 354,500
Level 21 - 403,500
Level 22 - 456,000
Level 23 - 512,000
Level 24 - 572,500
Level 25 - 637,000
Level 26 - 705,500
Level 27 - 778,000
Level 28 - 855,500
Level 29 - 937,000
Level 30 - 1,023,000
Level 31 - 1,113,500
Level 32 - 1,208,500
Level 33 - 1,308,500
Level 34 - 1,413,500
Level 35 - 1,523,000
Level 36 - 1,638,000
Level 37 - 1,757,500
Level 38 - 1,882,500
Level 39 - 2,012,000
Level 40 - 2,147,500
Level 41 - 2,288,000
Level 42 - 2,434,000
Level 43 - 2,585,000
Level 44 - 2,742,000
Level 45 - 2,904,500
Level 46 - 3,072,500
Level 47 - 3,246,500
Level 48 - 3,426,000
Level 49 - 3,611,000
Level 50 - 3,802,500
Level 51 - 4,000,000
Level 52 - 4,300,000
Level 53 - 4,650,000
Level 54 - 5,000,000
Level 55 - 5,400,000
Level 56 - 5,850,000
Level 57 - 6,350,000
Level 58 - 6,900,000
Level 59 - 7,500,000
Level 60 - 7,850,000
Level 61 - 8,400,000
Level 62 - 9,000,000
Level 63 - 9,600,000
Level 64 - 10,250,000
Level 65 - 10,900,000
Level 66 - 11,600,000
Level 67 - 12,350,000
Level 68 - 13,150,000
Level 69 - 14,000,000
Level 70 - 14,900,000
Level 71 - 15,850,000
Level 72 - 16,850,000
Level 73 - 17,850,000
Level 74 - 18,850,000
Level 75 - 19,850,000
Level 76 - 21,850,000
Level 77 - 23,850,000
Level 78 - 25,850,000
Level 79 - 27,850,000
Level 80 - 29,850,000
Level 81 - 32,850,000
Level 82 - 35,850,000
Level 83 - 38,850,000
Level 84 - 41,850,000
Level 85 - 44,850,000
Level 86 - 48,850,000
Level 87 - 52,850,000
Level 88 - 56,850,000
Level 89 - 60,850,000
Level 90 - 64,850,000
Level 91 - 69,850,000
Level 92 - 74,850,000
Level 93 - 79,850,000
Level 94 - 84,850,000
Level 95 - 89,850,000
Level 96 - 95,850,000
Level 97 - 101,850,000
Level 98 - 107,850,000
Level 99 - 113,850,000