Namco × Capcom
KOS-MOS is one of many playable characters in the 2005 tactical role-playing game "Namco × Capcom", along with M.O.M.O. and Shion also from "Xenosaga". In 2008, she appeared as one of playable characters in the role-playing game '. That same year, KOS-MOS made a cameo appearance in the role-playing game "Tales of Hearts", where she is one of many supporting attack characters for the player. In 2010, she appeared as a playable character in '. In 2012, she appeared as a playable character in the tactical role-playing game "Project X Zone", as well as the 2015 sequel.