The Game Census
Sylphy and the Sleepless Island cover art

Sylphy and the Sleepless Island

Milky Way · Kagura Games · 2021-10-08

SteamGOG

ActionAdventureIndieRPGSimulation

Modes: Single player

Releases: Oct 09, 2021 (PC (Microsoft Windows))

One day, professional thief Sylphy learns of the mystical and valuable artifact of the Kingdom of Diezel, but the mission goes sideways and she ends up robbing the island of its night! She has one week to right her wrongs in this action-filled RPG!

0
playing now
89%
positive of 185 reviews
Very Positive
steam rating
20,000–50,000
owners (SteamSpy est.)
pending
deck/linux tier (ProtonDB)
$19.99
steam price (US)

0 players in-game as of 2026-08-29 08:00 UTC (census sample)

Sylphy works hard as a thief to support her sickly sister as they eke out a meager life in the slums. One day, Sylphy learns of an incredibly rare and powerful treasure that could be the answer to all of their problems: The Orb of the Abyss. The Orb is locked away in a vault within the Kingdom of Diezel, a land of spirits and spirit worship. But Sylphy’s in luck because Diezel is kicking off a week-long Spirit Festival! She comes to Diezel with dreams of riches, but when the mission goes sideways, Sylphy finds herself a criminal and slave of Diezel. Her only hope of freedom is to help save the(Storyline via IGDB)

Health check

Insufficient data
  • · Not enough review history collected yet to judge health.
  • · Top 60% of 10,862 Action games in the census by review count.
Estimated sales: 3.7k–8.3k copies

Review-multiple estimate from 185 total reviews — how this is computed.

Current store prices

GOG$14.99-25%

Deal snapshots via CheapShark, refreshed daily.

12-month high $14.99 · on sale 0 of 1 observed days (census price snapshots)

Players online

202026-08-12 04:00 — 0 players2026-08-12 20:00 — 0 players2026-08-13 12:00 — 2 players2026-08-14 03:00 — 0 players2026-08-14 19:00 — 0 players2026-08-15 11:00 — 0 players2026-08-16 03:00 — 0 players2026-08-16 19:00 — 0 players2026-08-17 11:00 — 1 players2026-08-18 03:00 — 0 players2026-08-18 19:00 — 0 players2026-08-19 10:00 — 1 players2026-08-20 02:00 — 1 players2026-08-20 18:00 — 0 players2026-08-21 10:00 — 1 players2026-08-22 01:00 — 1 players2026-08-22 17:00 — 1 players2026-08-23 09:00 — 0 players2026-08-24 01:00 — 1 players2026-08-24 17:00 — 0 players2026-08-25 08:00 — 0 players2026-08-26 01:00 — 1 players2026-08-26 16:00 — 1 players2026-08-27 09:00 — 0 players2026-08-28 01:00 — 1 players2026-08-28 16:00 — 0 players2026-08-29 08:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Details

WindowsSingle-playerSteam Trading CardsSteam CloudFamily Sharing

3 supported languages: English, Japanese, Simplified Chinese

Player tags

RPGJRPGAnimeIndieMemesActionHentaiMatureNudityRPGMaker

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

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Similarity via IGDB.

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