beatmania IIDX
Arcade Releases
1st - substream - 2nd - 3rd - 4th - 5th - 6th - 7th 8th - 9th - 10th - 11 IIDX RED - 12 HAPPY SKY 13 DistorteD - 14 GOLD - 15 DJ TROOPERS 16 EMPRESS - 17 SIRIUS - 18 Resort Anthem 19 Lincle - 20 tricoro - 21 SPADA - 22 PENDUAL 23 copula - 24 SINOBUZ - 25 CANNON BALLERS 26 Rootage - 27 HEROIC VERSE 28 BISTROVER - 29 CastHour - 30 RESIDENT 31 EPOLIS - 32 Pinky Crush
Foreign Arcade Releases
beatmania IIDX (China) - tricoro (China)
Home Releases
Sony PlayStation 2
3rd - 4th - 5th - 6th - 7th - 8th - 9th - 10th beatmania (2006) - 11 IIDX RED - 12 HAPPY SKY 13 DistorteD - 14 GOLD - 15 DJ TROOPERS 16 EMPRESS + PREMIUM BEST
PC Releases
INFINITAS - INFINITAS (2020)
Mobile Releases
i-αppli - IIDX i-αppli - ULTIMATE MOBILE

General Information

Release Date: March 15, 2006
Featuring over 50 songs.
Songs are drawn from 5-key and 7-key games, as well as new US exclusives.
Game uses the 9th style CS Engine, but looks nothing like it.
Game modes include Game Mode (probably similar to Arcade Mode), Free Mode, Expert Mode, Practice Mode (not similar to Beginner Mode, but looks more like Lesson Mode in CS DDR games), and Training Mode.
There will be unlocks.
Another difficulties will be available.
Regarding song charts, nothing has been "toned down", but "very minor changes have been made to some of the 'annoying' measures within songs in hyper mode. Another charts haven't been touched."

Known Songlist

The judgement system has changed; there is now a judgement called "Perfect", presumably replacing Just Great. (Source: IGN Screenshot)
Difficulties are listed as "Beginner", "Normal", and "Hyper". Another may or may not exist.
Difficulties are now on a 1-10 scale, using stars. There may or may not be "flashing 10"/10+ rated songs.
Hard has apparently been renamed to "Challenge", or "CHA" for short.
5-key mode is known as "beatmania" mode, 7-key mode is known as "beatmania IIDX" mode. Konami no longer appears to be removing references to IIDX from videos, etc.
In 5-key mode, Free Zones have returned. Free Zones are areas in older songs where you can pretty much scratch as much or as little as you want. However, was extremely difficult to get a Great on a Free Zone. It is not known whether this problem has been corrected in this version.

There will be a replay mode to save replays of songs you have played. (Source: Mel B)

The grading system appears to have changed; it's possible to get a AAA with a money score of 170,000, or with more Greats than Just Greats. (Source: John Stiles)
Songs are divided between 5-key mode and 7-key mode; they do not appear on both. (Source: Bemanistyle)
Difficulties have changed - Nothing Ain't Stoppin' Us is a 5. (Source: Gamespot screen shots.) NOTE: As of 11/07/05, this is no longer the case. Songs now have their correct ratings (and Nothing Ain't Stoppin' Us is now a 2).
The timing window is unchanged. (Source: John Stiles)
Background music is the same as 9th CS. (Source: John Stiles)
The 7-key songs only had their Light 7 charts (labeled as "7 Key"). Pressing/holding Select does nothing. Konami claims this is because they didn't want to scare people off at E3 into not trying the game. (Source: John Stiles and happosai311)
There is no Goli art for result screens in the E3 build. (Source: John Stiles)
There is no doubles play in the E3 build. (Source: sherl0k)
In 5 Key mode, the right side player has buttons 1 and 2 disabled, not 6 and 7. (Source: John Stiles)
The Konami Original Controller is allegedly going to be redesigned to be "better" and at a "more worthwhile price". (Source: djparanoia)
Random+ is on the E3 demo. (Source: chubs)