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Planetarian: The Reverie of a Little Planet cover art

Mobile game · 2011

Planetarian: The Reverie of a Little Planet

Planetarian: The Reverie of a Little Planet is a Japanese post-apocalyptic visual novel developed by Key and is rated for all ages. The story centers on a middle-aged 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.

Nov 30, 2011AndroidiOSLegacy Mobile DeviceACB MCERO AESRB 18PEGI T

Community activity

Last checked Aug 9, 2026

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How many people have rated, reviewed or installed Planetarian: The Reverie of a Little Planet where it is sold.

Steam players in game

0

Reviews
2,031

First reading taken Aug 9, 2026 — the chart appears once there are two.

Only the games with a PC port appear here, but where Steam does report it is a real concurrent-player count rather than a proxy for one.

Community signals

How many people gather around Planetarian: The Reverie of a Little Planet outside the stores — members, subscribers and live viewers.

Twitch viewers

0

Live channels
0

First reading taken Aug 9, 2026 — the chart appears once there are two.

People watching this game on Twitch right now, summed across every live channel in its category.

Not tracked for Planetarian: The Reverie of a Little Planet: Google Play, App Store, Discord, Reddit, YouTube. A platform appears here once the game has a link to it — most mobile games have no Steam port or subreddit, so a gap is normal rather than a sign the game is small.

Storyline

"Why don't you come to the planetarium? The beautiful twinkling of eternity that will never fade, no matter what. All the stars in the sky are waiting for you." It is thirty years after the failure of the Space Colonization Program. Humanity is nearly extinct. A perpetual and deadly Rain falls on the Earth. Men known as "Junkers" plunder goods and artifacts from the ruins of civilization. One such Junker sneaks alone into the most dangerous of all ruins -- a "Sarcophagus City". In the center of this dead city, he discovers a pre-War planetarium. And as he enters he is greeted by Hoshino Yumemi, a companion robot. Without a single shred of doubt, she assumes he is the first customer she's had in 30 years. She attempts to show him the stars at once, but the planetarium projector is broken. Unable to make heads or tails of her conversation, he ends up agreeing to try and repair the projector...

Trailer

Trailer

Screenshots

Frequently asked questions

When was Planetarian: The Reverie of a Little Planet released?

Planetarian: The Reverie of a Little Planet was released on November 30, 2011 for Android, iOS and Legacy Mobile Device.

What platforms is Planetarian: The Reverie of a Little Planet available on?

Planetarian: The Reverie of a Little Planet is available on Android, iOS and Legacy Mobile Device.

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Other mobile games from Sekai Project, Key, Visual Art's Motto, Visual Art's MottoSP, PROTOTYPE, and Visual Arts.