Developed by Pentavision and published by Neowiz Internet, DJMax Ray was designed to bring the traditional high-difficulty "key-note" gameplay of the DJMax Portable series to mobile touchscreens. It was seen as a middle ground between the casual Tap Sonic and the more technical arcade-style DJMax Technika .

Because the game was delisted from official app stores and its in-app purchase (IAP) servers were shut down, many fans who originally purchased songs lost access to their content.

Unlike many mobile rhythm games of its era that used simple MIDI or background tracks, Ray utilized a "Real Key Sound" system where every tap triggered a specific instrumental sound, making the player feel like they were "performing" the music.

steampowered.com/bundle/24544/LEGACY_BUNDLE__DJMAX_RESPECT_V/">DJMax Respect V or

The game launched with 20 music packs (5 songs each), including many new tracks from legendary composers like NieN and ND Lee. The Significance of "7z" and Game Preservation

It featured 4, 5, and 6-button (row) modes and the signature "Fever" system, which allowed players to chain combos and multiply scores up to 8x.

The mention of "7z" in searches for DJMax Ray typically relates to the game's . Neowiz officially terminated the download service and server support for DJMax Ray on December 28, 2016 .

Much of the content from DJMax Ray has since been preserved legally through DJMax Respect V on platforms like Steam , which includes various legacy DLC packs featuring remastered versions of classic tracks.