Bio_100%

Bio_100% is a Japanese shareware game development collective started in 1991 by a group of three college students. The original founding members were:

• alty (アルティ) -- Real name Hideki Mori (森栄樹). Has worked at NTT Data, Microsoft, and Dwango. As of 2023, is the president of IoT development company Anodos.
• metys (メティス) -- Real name Go Takekoshi (竹越毅).
• Hitsujiotoko (羊男) -- Real name Masao Masutani (増谷正夫). Worked as a producer at NEC among other companies.

More than a dozen other creators have been credited as part of this group since it was established. Other notable members have included:

• nano-Ray-speX -- Real name Yoko Kuroyanagi (黒柳陽子). Worked at WiZ on the original Tamagotchi toys, and started developer Qnep in 1998.
• Tinyan (たいにゃん) -- Worked as a programmer for SystemSoft, and as a columnist for Beep Magazine through the 1980s.
• Koizuka (恋塚) -- Real name Akihiko Koizuka (戀塚昭彦). Worked at Dwango on the Nico Nico Douga video streaming platform.

In 1998, Mori attempted to take the group professional and established a company of the same name. However, after hard disk and server failures resulted in significant loss of data on all the company's commercial projects, operations of the group as a company ceased the following year. The group continued to release freeware and shareware games until at least 2012.