This Japanese PC games doujin group formed in late 1990 after several talented developers met on BBS networks, mainly those run by NIFTY-Serve, a joint venture between Fujitsu and Nissho Iwai (now Sojitz). Early creations like Super Depth and Sengoku TURB became popular among BBS users, eventually re-releasing in mail order & store shelf compilations. They made many classic, fondly recalled PC-98 freeware games until late in the mid-'90s, at which point the group largely went their separate ways to ASCII, Bandai, and other companies. After their first and last console game, a remake of Sengoku TURB for Dreamcast, Bio_100% officially disbanded.