Chunithm

Chunithm (チュウニズム) (stylized in all caps) is an arcade rhythm game developed and published by Sega. It was demonstrated first in some Japanese arcades in November 2014, and was officially released on 16 July 2015. The game's title of Chunithm is a portmanteau of "chūnibyō" and "rhythm".

In a livestream on 20 October 2021, Sega announced that they will reboot the CHUNITHM series and make a new game called “CHUNITHM NEW” with style based on the original "CHUNITHM". Along with "CHUNITHM NEW", new cabinets are also released along with the new game. Many new features and improvements were made to the new machine, such as: These new cabinets are called "Gold Model" while old cabinets are now called "Silver Model”. Old "Silver Model" cabinets can be converted using conversion kits to run "CHUNITHM NEW".
 * 120fps monitor
 * Upgraded speaker, earphone jack, and touch panels
 * Digital payment support
 * Avatar and arena battle
 * Level adjustments, extending from level 14 to level 15.

Gameplay
In Chunithm, players use touch and motion-based sensor bars to input commands that correspond to the notes scrolling down from the top of the screen. Depending on the type of note, players may be required to tap, hold, or slide their fingers against the bottom sensor bar or wave their hands in the air between the sensors located on either side of the machine.


 * TAP: These are notes that you tap when it is within the judgement line. It is colored red. ExTAP, a variation of the TAP note, will always be hit as "JUSTICE CRITICAL" when hit.
 * HOLD: These are notes that you hold when it reaches the judgement line. HOLD notes don't have a release timing. You can still release after the note is done.
 * SLIDE: These notes are similar to the HOLD notes. This is simply a HOLD note that could move either left or right.
 * AIR: These notes have two types, an upward AIR note and a downward AIR note, the latter being exclusive to the "MASTER" difficulty. Upward AIR notes can be followed by an AIR-HOLD notes similar to regular HOLD notes where the player has to keep their hand in the air until it ends. There also exist AIR-ACTION notes where you have notes that you have to swing your hands to hit.
 * FLICK: Exclusive to the "MASTER" difficulty and "WORLD'S END". These notes are similar to TAP notes. Tap and flick the note when it appears.
 * DAMAGE: Exclusive to "WORLD'S END". These are notes where tapping will result in a "MISS" judgement. Missing the note will result in a "JUSTICE CRITICAL".

CHUNITHM NEW introduces two new AIR note types.


 * AIR-SLIDE: These notes are similar to AIR-HOLD and SLIDE notes. This is simply an AIR-HOLD and SLIDE notes combined.
 * AIR-CRUSH: These are notes that are like AIR-ACTION notes but can exist without AIR-HOLD.

Rating
In Chunithm, a rating system exists as an indicator of a player's level. The rate is calculated from your best score of 30 songs and your recent score of 10 songs. The rating system was redesigned with the launch of ”CHUNITHM NEW“ and is currently divided into nine levels by color. (Rating 17.41 is reachable at this time.)

Score constant
The level of each score is internally valued to the first decimal place. For example, the same level 12 notation may be 12.0 or 12.4 internally. This value to the first decimal place is called the "score constant" (not the official name). This score constant is used in the rating calculations.

When the first decimal place is 5 or more (n.5 to n.9), "+" is added to the level notation.

Levels 9+ and below have a decimal place depending on the presence or absence of "+".

Levels 6 and below and 7 to 9 without + always have 0 (n.0) as the first decimal place of the score constant.

Levels 7+/8+/9+ always have 5(n.5) decimal places.

A specific value is added to the score constant according to the score to determine the rating for each piece.

Release
The first version of Chunithm released outside of Japan, "CHUNITHM SUPERSTAR", is expected to be released at certain dates at different countries. "CHUNITHM SUPERSTAR" is based on "CHUNITHM STAR" that was released back in 2017.

"CHUNITHM SUPERSTAR PLUS" was released on September 2, 2021 via an online update. This new version added the following to the game:

CHUNITHM NEW International Version was announced on February 22, 2022. It was released on 3 March 2022. Due to differences with the Japanese version, data will still be separated.
 * Course Mode
 * WORLD'S END

The launch dates, its countries/areas, and the version first released in these countries/areas are:

In addition, many Round1 locations in the United States feature CHUNITHM PARADISE LOST cabinets. However, these cabinets are offline, and have a limited selection of songs.
 * Singapore: November 26, 2020 (CHUNITHM SUPERSTAR)
 * Taiwan: November 27, 2020 (CHUNITHM SUPERSTAR)
 * Hong Kong: December 2, 2020 (CHUNITHM SUPERSTAR)
 * Macau: December 3, 2020 (CHUNITHM SUPERSTAR)
 * Korea: December 9, 2020 (CHUNITHM SUPERSTAR)
 * Australia: February 2, 2021 (CHUNITHM SUPERSTAR)
 * New Zealand: March 27, 2021 (CHUNITHM SUPERSTAR)
 * Thailand: April 3, 2021 (CHUNITHM SUPERSTAR)
 * Mainland China: September 8, 2022 ''(CHUNITHM NEW)
 * Malaysia: October 12, 2022 (CHUNITHM NEW PLUS)
 * Philippines: October 31, 2022 (CHUNITHM NEW PLUS)
 * Indonesia: September 16, 2023 (CHUNITHM SUN)