Planetarian: The Reverie of a Little Planet

Planetarian: The Reverie of a Little Planet
Cover featuring heroine Yumemi Hoshino
Developer(s)Key
Publisher(s)
Artist(s)Eeji Komatsu
Writer(s)Yūichi Suzumoto
Composer(s)
Platform(s)Microsoft Windows, PlayStation 2, Freedom of Mobile Multimedia Access, SoftBank 3G, PlayStation Portable, Android, iOS, Nintendo Switch
ReleaseThe Reverie of a Little Planet
November 29, 2004
  • Windows
    • JP: November 29, 2004
    • JP: April 30, 2010
    • WW: September 12, 2014
    • JP: July 29, 2016[a]
    • JP: September 3, 2021
    • WW: September 19, 2022[a]
    PlayStation 2
    • JP: August 24, 2006
    FOMA, SoftBank 3G
    • JP: November 28, 2006
    PlayStation Portable
    • JP: August 24, 2009
    Android
    • JP: November 30, 2011
    iOS
    • JP: November 30, 2011
    • WW: January 7, 2013
    Nintendo Switch
    • WW: January 31, 2019
Snow Globe
September 3, 2021
  • Windows
    • JP: September 3, 2021
Genre(s)Visual novel
Mode(s)Single-player

Planetarian: The Reverie of a Little Planet (planetarian ~ちいさなほしのゆめ~, Planetarian: Chiisana Hoshi no Yume) is a Japanese post-apocalyptic visual novel developed by Key, a brand of Visual Arts whose previous works include Kanon and Air. It was released over the Internet on November 29, 2004, for Windows, and is rated for all ages. The game was later ported to the PlayStation 2 (PS2), PlayStation Portable and Nintendo Switch, as well as mobile devices. The story centers on a man who comes across a malfunctioning robot in a dead city. The man, known simply as "the junker", stays with this robot for a time and attempts to fix the projector of the planetarium where the story takes place.

Key defines Planetarian as a "kinetic novel", since its gameplay offers no choices or alternate endings. Instead, the player proceeds through the story solely by reading. The story is written by Yūichi Suzumoto and character design is produced by Eeji Komatsu. The game's soundtrack was composed and arranged by Key's signature composers Magome Togoshi and Shinji Orito. A light novel of short stories set in the world of Planetarian was released in April 2006, and three audio dramas have also been produced. David Production produced a five-episode original net animation series and an anime film in 2016. Planetarian's story, artwork and music have been praised, and the PS2 version ranked first for console games in terms of satisfaction in 2007.
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