There is a total of 137 songs available in the arcade version. This includes all 72 from the original arcade game, the three new songs in the home version, and 65 brand new songs, four of which are hidden and unlockable.
A lawsuit filed by Konami on May 9, 2005, asked for an injunction against the sale of the upgrade kit version. October 23, 2006 Konami and Roxor reached an out-of-court settlement which resulted in Konami acquiring the intellectual property rights to the In The Groove franchise and thus effectively terminated the distribution of the game in North America.
In development, it was known solely as In the Groove 2. On June 18, 2005, Roxor Games officially announced the release of the game, and announced that it would add the name of Andamiro's Pump It Up line, becoming Pump It Up: In the Groove 2. However, "Pump It Up" only appears on the marquee of the dedicated cabinets developed by Andamiro. The name also appears on the title screen of a un-updated Andamiro made cabinet. The name appears nowhere on a unupgraded cabinet. The game also features a modified interface, based on the first version but recolored red and incorporating other changes. The interface also features a new font; the first version used a generic font.
USB memory card support has been expanded on In the Groove 2, with the ability to now install revision updates stored downloaded from the internet saved onto the memory card. Several revisions have been released, most of them adjusting timing windows, fixing sync issues with songs, and fixing other bugs. However, only "r2" machines have the ability to install revision patches. Some early ITG2 machines contain "r1", which does not contain the Machine Update option. The biggest addition of functionality added with the patches was contained in "r21", which added the ability to load custom songs from the memory card.
Rolls are a new feature. They look like spiky hold notes and usually come in pairs. The player must continually tap the corresponding arrows until the end of the roll, much like the drum roll notes in Namco's Taiko no Tatsujin. Regardless of the song's speed, rolls must be tapped at least once every 0.3 seconds.
Survival Mode is another course-based gameplay mode. The player must play a five-song course, where each song has a time limit less than the song's length. Time left over after each song is carried over to the next, and missteps deplete the time remaining - time is only added for Fantastics, with no change for Excellents and detractions for anything lower. The lifebar in this mode is not used to determine whether the player passes. Instead, it serves as a visual indicator of how much time is remaining. The game ends when the remaining time is fully depleted.
Fitness Mode is a common home version feature on dance games that is included in the arcade version of ITG2. This gameplay mode allows users to keep track of time spent dancing and calories burned.
Three previously Marathon-only modifiers - Bumpy, Beat, and Robot (a metallic gray Flat arrow type) - have also been added to the regular modifier list. In addition, a multi-colored arrow type, Vivid, has been added for colorblind players. It resembles the default arrow color scheme used in Dance Dance Revolution.
"Excellent", "Great" and "Decent" judgments are now prefixed or suffixed with a dash. A prefix (-Excellent, -Great or -Decent) indicates that the player stepped too early; a suffix (Excellent-, Great- or Decent-) indicates that the player stepped too late. In novice mode, "Way Off" becomes "Way Early" and "Way Late" respectively; in other modes, the dash system still applies.
"Stretch Jumps" have been included in double play, a jump that requires a player to hit two panels simultaneously that are farther away from each other than normal jumps, such as 1PU+2PD or 1PL+2PL.
As with the original game, several artists that have released songs for Dance Dance Revolution games appear on ITG2. These include Bambee, Missing Heart, Spacekats (known as Bus Stop in DDR, with the exclusion of one member), Ni-Ni, Triple J, E-ROTIC and Lynn (Papaya in DDR). In fact, three songs appear on ITG2 that have been on Dance Dance Revolution games, though with different step charts: Typical Tropical and Bumble Bee from Bambee and Sunshine (originally Follow The Sun) from Triple J.
Of note, Wanna Do ~Hardhouse Mix~ is the only song in ITG to have a dedicated music video in-game.
The difficulties are abbreviated to conserve table space:
Songs that need to be unlocked are highlighted in red. Some Expert step routines have to be unlocked separately, even though the songs they go to are playable from the start. These are denoted with an asterisk.
This list includes the five songs made playable in the home version of In the Groove. These are highlighted in green, and do not have to be unlocked in this game.
|Agent Blatant||Ernest + Julio||81-162||1||5||6||7||10||3||5||8||10|
|Baby Don't You Want Me||Nina||135||1||2||5||7||9||2||3||7||9|
|Clockwork Genesis||Inspector K||175||1||5||7||9||11||4||7||9||11|
|Disconnected -Disco-||Kid Whatever||139||1||5||6||8||9||3||6||8||10|
|Funk Factory||Money Deluxe||130||1||4||7||8||9||4||7||8||9|
|Get Happy||Boom Boom Room||67-133||1||3||5||7||9||3||6||8||9|
|Go 60 Go||Takoyaki||160||1||4||7||9||12||4||6||9||9|
|Habanera 1||Boom Boom Room||81-158||1||3||5||7||2||5||8||9|
|Hardcore Symphony||Digital Explosion||174||1||4||7||9||11||4||6||9||10|
|Hillbilly Hardcore||Benga Boys||136||1||4||5||8||10||3||5||8||9|
|Hispanic Panic||Chucho Merchan||140||1||4||6||8||10||3||5||8||10|
|Holy Guacamole||Chucho Merchan||140||1||3||6||7||10||2||5||7||9|
|Hustle Beach||Papa J||128||1||2||5||7||2||6||7||9|
|Ize Pie||Headtwist & Pump||68-136||1||2||5||7||9||3||6||7||9|
|Know Your Enemy||Hybrid||130||1||4||6||9||10||3||6||9||10|
|Life of a Butterfly||Nina||68-136||1||3||5||7||3||6||7|
|Lipstick Kiss||Ernest + Julio||165||1||3||6||7||9||2||6||8||9|
|Liquid Moon||Inspector K||160||1||2||6||8||9||2||6||9||10|
|Little Kitty Mine||Ni-Ni||139||1||3||5||7||9||3||5||7||9|
|Music Pleeze||B. Dastardly||124||1||4||6||7||9||3||5||7|
|My Life Is So Crazy||DJ Zombie||140||1||4||6||8||9||2||5||8||9|
|One False Move||Dust Devil||53-105||1||4||6||9||10||3||5||9||10|
|Out of the Dark||Hybrid||136||1||5||7||9||10||3||6||9||10|
|Pick Me Up & Tango||Nina||133||1||3||6||8||3||6||8|
|Psalm Pilot||Jason Creasey||130||1||3||5||8||9||3||6||8||9|
|Ride the Bass||DJ Zombie||138||1||2||4||7||9||2||6||8||9|
|Spacy Crazy Girl||Ni-Ni||135||1||3||5||7||9||3||6||7||9|
|Spin Chicken||Freebie & The Bean||124||1||2||4||7||10||3||5||7||9|
|Summer ~Speedy Mix~||:)||185||1||4||6||9||13||4||7||9||11|
|Summer in Belize||Digital Explosion||138||1||3||5||8||10||3||6||9||11|
|Sweet World||Omega Men||132||1||3||6||8||10||3||6||7||11|
|Temple of Boom||Yanis Kamarinos||146||1||3||6||9||10*||3||6||9||10*|
|This is Rock & Roll||DJ Zombie||140||1||3||5||7||9||3||6||8||9|
|Vorsprung Durch -Techno-||Sly/Fly/Badman||100-132||1||4||6||8||10||3||6||9||10|
|Wake Up||Kid Whatever||138||1||4||6||8||9||3||6||8||9|
|Wanna Do ~Hardhouse Mix~||Nina||149||1||3||6||8||10||2||5||9||10|
|We Know What To Do||Matiloe||140||1||2||4||7||9||3||5||8||9|
As In The Groove 2 matured as an arcade game, Roxor released patches, called "revisions", that could be applied to the machine in order to update it, fix bugs, adjust timing window errors, and other issues as they were discovered. This list contains only changes that were officially published by Roxor Games.
While InTheGroove.com is no longer available, their website discussing these Machine Updates, and their respective downloads are still available on Archive.org's Way Back Machine
An unofficial patch was later released online to circumvent the limit, and making the machine think it the song is only 1:45 long, commonly referred to as the Ogg Length Patch. This allows songs of any length to be played on the machine, provided the music file is still under 5 MB in size. Playing songs that are longer than 3 minutes is looked down upon by some arcade operators due to the possibility of losing money, and in some cases, bans have even been issued on players who play songs whose length exceeds 3 minutes. However, it may be worth noting that a portion of ITG players do keep their play of such patched songs in check when others are waiting in line to play. This was however countered with r23, which fixed other bugs (such as a bug causing background scripts from existing songs to not function correctly), but also forces all custom songs to end at 120 seconds of play (if the song is longer than that, it simply cuts it off at that point).
Despite this change, Revision 23 is unpopular with the majority who play ITG (more professional players prefer r23 due to the timing bugs that were created in r21 and fixed in r23) than Revision 21 was due to the strict time limit, since some official Dance Dance Revolution songs and many songs on the In The Groove 2 cabinet itself go beyond this time limit. Some players feel that RoXor should have implemented a system similar to Dance Dance Revolution 5th Mix (and already implemented in StepMania) in which songs longer than 150 seconds (2 1/2 minutes) are deemed a "long version" song, which takes up two stages (two songs' worth) of the player's credit, instead of just counteracting the Ogg Length patch.
Due to the fact that In the Groove runs a distribution of Debian Linux and that the game utilizes StepMania as its engine (which has been used outside ITG for creating and distributing stepcharts for other songs), technologically savvy players have found methods of hacking additional content onto a In the Groove 2 machine. The most popular methods involve utilizing a live Linux distribution (most methods SLAX Frodo) to boot the machine to a rogue operating system that the user has control over. Additional songs are loaded onto a USB card (plugged into the Player 1 USB port), and a USB keyboard (plugged into the Player 2 USB port) is used to type commands at the Linux console. Most of these hacks utilize an option in one of StepMania's configuration files, Static.ini, to load songs and content from additional locations other than the main song folder.