Core gameplay remained the same on 7th Style. 5-key mode has been changed from a difficulty to its own modifier, allowing it to be used on any difficulty level as with normal charts. A new spinoff of Expert Mode also debuted, Daninintei (Class) mode, a mode containing a series of courses ranked so that each course is harder than the last, the highest rank course a player can beat in Dan mode is often used to compare players. Dan mode would have significant integration in future styles implementing the e-Amusement system, which could save a player's rank, and may also restrict access to specific songs based on their current rank.
Extra Stage - To access the Extra Stage (or the One More Extra Stage from the Extra Stage), the player must AAA a flashing 7-ranked song with Hard mode on. The extra stage is MAX 300, a song well known as being the extra stage from DDRMAX: Dance Dance Revolution 6thMix (which had been released a few months before). The OMES is Kakumei, a remix of Chopin's Revolutionary Étude by dj TAKA with NAOKI (which is also the OMES of DDRMAX2).
The home version of 7th Style was released several years later in 2004 for the PlayStation 2. It contained two preview songs from 8th and 9th Style, as well as some revivals. 5-Key was left as a mode instead of a modifier (unlike the arcade version), and unlike future home releases, the special Extra Stage methods were not present. Masters Mode was also introduced as a modified version of Survival Mode.