TECHNOPOLIS 2085 is an instrumental electronic track by PRASTIK DANCEFLOOR, originally debuting in CHUNITHM PARADISE LOST and later brought to maimai でらっくす CiRCLE PLUS as part of the CHUNITHM X-VERSE-X cross-title collaboration. The song paints a vision of a futuristic metropolis through crisp synth melodies and driving dancefloor rhythms at 134 BPM, staying true to PRASTIK DANCEFLOOR's signature aesthetic, polished techno production with memorable hook lines rather than aggressive bassweight. The track carries no vocals, letting its synth arpeggios and layered percussion do the storytelling. In maimai, TECHNOPOLIS 2085 arrives as a locked song: players must play it in the corresponding CHUNITHM X-VERSE-X arcade cabinet to unlock it for maimai, continuing SEGA's cross-title linkage system between its three arcade rhythm games. The song also appears in オンゲキ bright MEMORY and was later featured in the mobile rhythm game Phigros as part of a CHUNITHM collaboration pack, making it one of the more widely traveled tracks in the PRASTIK DANCEFLOOR catalog. The jacket art depicts Miriam Bemidobar, a character originally from CHUNITHM, reinforcing the cross-franchise identity.