 On February 9, 2007, One was released playable on FOMA cell phones via a Java program by NTT DoCoMo. A second mobile release playable on au mobile phones was released on March 1, 2007 by KDDI. A third mobile release, also playable on FOMA cell phones, was released by SoftBank Mobile on July 2, 2007. The last release by Nexton was on June 1, 2007 as a Windows Vista compatible edition for the PC. Gyutto released the full-voice, Vista-compatible edition of One as a downloadable version on February 26, 2010. The version for the PlayStation, and the mobile versions released by KDDI and SoftBank Mobile did not contain adult material. A promotional video for the game is still available for download at Tactics' One website.
