O2Jam

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O2Jam is an online rhythm game developed in Korea by O2Media. At present there are agencies in many countries and regions. All information in this page is based on the Malaysia version, published by e-Games. It is similar to Beatmania IIDX in its interface, and shares many similarities with another music game, VOS, an abbreviation from Virtual Orchestra Studio.

Contents

1 Gameplay

1.1 Finding a Room
1.2 Selecting a Song
1.3 Playing a Song

2 Level System
3 Currencies of O2Jam
4 Pay to Play/Free
5 Skill Rings

5.1 Arrange Rings
5.2 Visibility Rings
5.3 Power Ring

6 Criticism

6.1 Server Load
6.2 Hackers
6.3 Timing Window

7 External links

Gameplay

Playing the game is divided between finding a room to play in, selecting a song, and playing a song. There are 3 servers in the Korean version of O2Jam, technically called Music-Halls: Melpomin, Kalliope, and Kleo. All 3 servers are named after the Muses in Greek mythology.

In the Malaysian version of O2Jam, there are only Kalliope and Kleo. Both are free to use, although about half of the songs cost money to play. In Kalliope, only songs level 15 and below may be played, while Kleo allows all songs above level 13.

In the Philippines Version, there are only two Free-2-Play Forever servers. These are Euta and Thalo. Euta serves as the Philippine's main server while Thalo serves as its temporary emergency server, mostly used when Euta is on stabilization and maintenance. Euta covers almost 95% of the player population, while Thalo covers only 5%.

Finding a Room

After choosing a server on which to play, the player is presented with a list of "channels," each which allow a maximum of 100 users at a time. Upon selecting a channel, the player is presented with a list of rooms. The player can either find a room in which to play manually, press the "Short Cut" button to take the user to a random available room, or press the "Create" button to allow the player to create a room of his own from the following list:

Single Rooms are rooms in which only the creator can play. These rooms are especially useful for practicing new or hard songs, for in versus mode, if a player loses on a song that is not on the Easy difficulty, he must wait for everybody else to lose without being able to play. The creator of the room can select any song, difficulty, speed modifier and ring modifiers available to him on the server.
VS Rooms are where the multiplayer portion of the game is played. Up to 7 other players can join a versus room, and the person in control of the room (initially the creator) selects each song, difficulty, speed modifier and ring modifiers. A minimum of two total players in the room is required to play. The winner of the match is the one with the highest score.
Album Rooms are rooms in which one or more players can choose a song course and play against each other. Song courses are preset lists of songs with preset difficulties that are played immediately after each other without stop. The person in control of the room (initially the creator) selects each course, speed modifier and ring modifiers. Although there are many from which to choose, ranging in difficulty from very easy to very hard, this mode is not very popular. The overall score for the match is the sum of the scores for each song, and the winner is the player with the highest overall score.
Couple Rooms are rooms where two people in the same physical room or over the internet can play against each other. Player one controls the first four notes with the keys S, D, F, and Space. Player two controls the last three notes the keys 4, 5, and 6 on the numpad. No other players are allowed to join. Cooperation is needed to successfully clear a song.
Jam Rooms were a conceptual room type which were never successfully implemented into O2Jam. This kind of room involved each of the players playing the notes of one or more instruments in the song. Each player would hear what the other was playing, allowing them to collaboratively play the complete song, similar to how a band would play a song. However, due to connection issues, this room type was never implemented.

Selecting a Song

Over 350 songs on the Korean server and 270 on the Malaysian server are currently available to play. Including all O2Jam versions, there are over 550 songs available for playing(~3.4GB in .ojn and .ojm files). While some of them come included with the game's full installer, many of them require a separate download after installation. Unfortunately, the downloads of the songs are very slow, sometimes reaching 15 minutes on a cable modem. To fix this, all of the songs are available through an official Bittorrent download.

The genres that the songs are part of run the gamut from piano pieces to techno versions of classical pieces to songs that are reminiscent of J-Pop, with an unusually large number of Christmas-themed songs. Most of the songs have 3 difficulty levels of play. The harder the difficulty, the more notes, drum beats, and other sounds need to be played by the player, as opposed to automatically being played in the background. On the hardest difficulty, many songs have a limited amount of music not being played by the user.

To be able to play a song in a VS Room, the song must either be free and each player have the song downloaded, or be payed for and downloaded by each player. To play in an Album Room, all songs in the album being played must have been downloaded before the album can be played.

A small optional step while selecting the song is selecting the background that all of the players will play on. This is mostly a cosmetic change, since all this does is determine what playing field the avatars will be standing on and what font the combo counter and note quality indicator (Cool/Good/etc.) will be in, as well as determining the visual effect that displays whenever a note is hit well. By default, however, the background is random.

Playing a Song

Playing a song is similar to most rhythm games in general, and Beatmania specifically. Horizontal bars slide down a series of seven columns, each corresponding to a key on the keyboard. Just before the notes hit the bottom of the column, the player has to hit the key corresponding to that column. As in Beatmania, each keypress emits a note, vocal, or other instrument that creates a full-sounding song. A correct hit is also rewarded with a small 3D effect that is determined by the background on which the players are playing.

The grading scale used by the game is, from most accurate press to least, Cool (depending on the background this note class may also be referred to as Great), Good, Bad, and Miss. Consecutive Cool and Good notes add both to the player's combo and to their Jam meter. When the Jam meter fills up, a large number flashes in front of the player's avatar indicating their current Jam Combo. The goal of the player is to get both a high individual note combo as well as a high Jam Combo. Because the Jam meter fills up faster when a player hits a Cool instead of a Good, two players can both get a full combo (hitting every note as a Cool or Good) but still have a different Jam Combo.

When the player gets fifteen Cools in a row, a blue pill appears near the upper right of the playing field, with a maximum of five pills. Each one of these pills will transform a Bad hit into a Cool, keeping the player's combo going, although losing a pill.

In a VS room, after all of the players are done playing the song, their individual scores are ranked against each other, and all players are awarded Gems (in-game currency, see below) based on how well they performed.

One way players challenge themselves is by increasing or decreasing the speed at which the notes descend. The multipliers from the "base speed" are x0.5, x1, x1.5, x2, x2.5, x3, x4, x6, and x8. These modifiers are often points of contention in VS Rooms, as many players try to play a song at the fastest speed possible, while others prefer to have the notes a bit slower. With many harder songs, x1 is used to increase the challenge, as the notes end up closer together, making it harder to read. Speeding up the notes does not affect the music at all, but instead spreads out the notes, making them (in non-extreme cases) easier to read (imagine using a bigger font instead of a smaller one).

As of January 27, 2006, the x8 speed was replaced by the xR speed in the Malaysian version of O2Jam. This mode allocates a different speed to each note column when playing the song, making songs even more challenging.

Level System

Similar to GunBound, players level up as they play more and more games against each other. Most levels are reached by simply playing enough songs to gain enough EXP to reach the next level, similar to most RPGs. EXP is earned by playing in rooms against other people, although the game allows players to earn EXP in Single rooms before level 10. However, right before a player can reach every fourth level, a mission is presented to the player, such as to beat a song level 6 or above with a 100 combo. If the player achieves that goal during a VS match, they immediately gain a level. On the converse side, if a player cannot accomplish the mission, they are stuck at their current level until they can pass the mission. New characters start at level 0, with the difficulty of missions and the amount of EXP needed to advance increasing each level up to a maximum of level 100.

Game Masters (commonly called GMs) appear in the game as level 999 characters.

Currencies of O2Jam

In another similarity to GunBound, O2Jam has two methods of paying for items in game, one of which involves real-life money (e-Points) and the other of which is rewarded through playing the game (Gems).

e-Points are the universal currency on the Malaysian O2Jam's host website, e-Games. e-Points can be purchased internationally over the internet at [Buyepoints.com]. The price is approximately $6.00 (USD) for 200 e-Points, with discounts when buying in bulk. Songs and avatar items can be purchased with e-Points, with the cost rarely going over 50 e-Points per song/item. The highest song cost is 50 e-points and the lowest is 10 e-points.

Gems are awarded to players who play in either single rooms up to level 10, or in multiplayer rooms. The better a player does on a song (the higher number of Cool and Good notes, max combo and Jam Combo) and the more difficult the song, the more Gems they receive. About half of the avatar items, and a small number of the pay-to-play songs are purchasable using this in-game currency. The highest song cost is 60,000 Gems and the lowest is 4,000 Gems.

Pay to Play/Free

The Korean O2Jam comes in both free and pay to play versions. The free version does not allow players to customize their avatars at all, and limits them to a very small selection of songs. Otherwise, it is a fully functional version of the game, with no expiration.

The pay to play version allows players a few extra options:

Avatars: Each player is represented with an avatar that they may customize with a wide variety of clothing, musical instruments, and other various accoutrements. Paying members will also be able to buy Skill Rings, which allow for challenging variations in usual game play (see below).
More Songs: Most of the new songs that are released for the game are only for the pay-to-play members. The vast majority of the songs are purchased with E-points, while a few of them are purchased with Gems. Buying a song only unlocks the user account's ability to play it.

Downloading the song files is separate from purchasing it, so many O2Jam players have the files for songs which that they cannot play.

Levelling Up: While on the Free server, players are able to gain EXP and therefore level up. The amount of EXP (experience) gained by players varies from song to song, depending on its difficulty and performance. The harder the song and the higher the score, the more EXP the player gains.

As of December 1, 2005, the Malaysian version of O2Jam has become free for all players. However, users are required to pay to play for about half of the songs if they wish to play them. However, gaining EXP, buying avatar items and playing all of the free songs (of which there are currently 155) is freely available to all users. Like most pay-to-play songs, some avatar items still cost e-Points, but they are not required to play and there are avatar items purchasable with the in-game currency of gems.

Skill Rings

Skill Rings allow for variations of the usual game play in different ways. Skill Rings must be activated by the room host and apply to all players in that room during the song period. There are three categories of Skill Rings: Arrange, Visibility and Power. Skill Rings may only be bought using e-Points in the Malaysian version, and last for a set number of uses before they disappear. Each Skill Ring has a different effect, as outlined below.

Arrange Rings

Mirror Ring: This ring 'reflects' the notes required from one hand to the other. Uses: x10, x50
Random Ring: This ring randomly swaps the note columns for the entire song. For example, all notes which usually appear on the left-most column will appear in another random column, instead. Uses: x10, x50.
Panic Ring: This ring randomly swaps the note columns for a four-beat bar of notes. This is similar to the Random Ring, except the swap takes place every four beats, instead of for the whole song. Uses: x10, x50

Visibility Rings

Hidden Ring: This ring makes all notes disappear from view half-way down the playing area. This makes timing notes much more difficult. Uses: x10, x50
Sudden Ring: This ring makes all notes invisible for approximately the first half of the playing area. This shortens the viewing time for notes significantly. Uses: x10, x50
Dark Ring: This ring makes all notes invisible except for a small area in the middle of the play area. This is one of the most difficult rings to play with. Uses: x10, x50

Power Ring

The Power Ring was implemented on January 27, 2006 in the Malaysian version of O2Jam. This ring can be used by the host and hackers alike to make all songs they have temporarily available to other players in the room, i.e. all pay-to-play songs which the host has purchased become available to players in the room. There are two conditions which must be met to allow this ring to work, however. (The feature has been implemented but the ring is currently not in sale)

The host must have bought and downloaded the files (.ojn and .ojm) for the desired song
All players must have downloaded the song files (.ojn and .ojm) for the host's chosen song
It was taken out from Malaysia O2Jam due to massive hacks using this ring.

Criticism

Most of the criticism applies to the Malaysian version.

Server Load

During peak hours on the Malaysian version, the Kalliope server becomes slow and it is not uncommon for the server to reach full capacity. As a result players who still wish to play will have to go to the Kleo server.

Hackers

Recently, there has been an abundance of hackers on the Malaysian version of O2Jam. The most common hack involves obtaining a maximum score of 99,999,999 on a song. During the song in question, the hacker's JAM counter may rapidly pop up, as well as reach high numbers and even "roll over" back to 1. Some other hackers have been able to kick room masters out of their rooms; as a result there is no room master and the room becomes unusuable.

There is a thread on the O2Jam Message Board for reporting hackers. [link]

Timing Window

Some players, particularly those who have played beatmania IIDX, have found it easier to score Cools on O2Jam than Just Greats on beatmania IIDX. In fact it is likely that the timing window for each note judgement is based not on milliseconds, but rather beats; this is especially noticable in the beginning of the song zl, in which the song slows down to 1 BPM and the player has four notes to hit. A note could be somewhat above the red bar on the screen and still be registered as a Cool when hit. ^{[[Citing sources citation needed]]}

External links

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