List of Key video games
Title Version Release date Rating Status
Kanon Kanon ( limited edition ) June 4 , 1999 Adult Discontinued
Kanon Kanon ( regular edition ) June 4 , 1999 Adult Discontinued
Kanon Kanon ( all ages edition ) January 7 , 2000 All ages Discontinued
Kanon Kanon Standard Edition November 26 , 2004 Adult Available
Kanon Kanon Standard Edition January 28 , 2005 All ages Discontinued
Kanon Kanon July 31 , 2009 All ages Discontinued
Kanon Kanon ( all ages memorial edition ) April 30 , 2010 All ages Available
Air Air ( limited edition ) September 8 , 2000 Adult Discontinued
Air Air ( regular edition ) July 27 , 2001 Adult Discontinued
Air Air ( all ages edition ) July 27 , 2001 All ages Discontinued
Air Air Standard Edition April 8 , 2005 Adult Available
Air Air July 31 , 2009 All ages Discontinued
Air Air ( all ages memorial edition ) May 28 , 2010 All ages Available
Clannad Clannad ( limited edition ) April 28 , 2004 All ages Discontinued
Clannad Clannad ( regular edition ) August 6 , 2004 All ages Discontinued
Clannad Clannad Full Voice February 29 , 2008 All ages Available
Clannad Clannad July 31 , 2009 All ages Discontinued
Clannad Clannad ( all ages memorial edition ) May 28 , 2010 All ages Available
Planetarian : The Reverie of a Little Planet Planetarian : The Reverie of a Little Planet ( Kinetic Novel edition ) November 29 , 2004 All ages Available
Planetarian : The Reverie of a Little Planet Planetarian : The Reverie of a Little Planet ( package limited edition ) April 28 , 2006 All ages Discontinued
Visual novel list -- Windows
Key is a Japanese visual novel video game development studio and brand under the publisher VisualArt's. The video games developed by Key are initially published by VisualArt's and released for Windows; consumer ports are published by Interchannel and Prototype. Key released their debut title, Kanon, in 1999, followed by their second title, Air, in 2000. Both Kanon and Air were initially released as adult games, but Key released their third game, Clannad, in 2004 with a rating of approval for all ages. Key's fourth game, , was also released in 2004 with a rating for all ages, and is described as a kinetic novel by the development team because of its completely linear storyline. Key's fifth game, , was released in 2005 as an adult game and spin-off from Clannad; it expanded on the scenario of the heroine Tomoyo Sakagami. Key released their sixth visual novel, Little Busters!, in 2007 with a rating for all ages. Key's seventh title, Little Busters! Ecstasy, was an expanded, adult version of Little Busters! released in 2008. Key's eighth game, Kud Wafter, was released in 2010 as an adult game and spin-off from Little Busters! Ecstasy; it expanded on the scenario of the heroine Kudryavka Noumi.