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Sylphy and the Sleepless Island
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!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-27.
“This game is really good. The story is about a thief named Sylphy who visits Diezel Island to steal a magic orb. This orb ends up destroyed, freeing Lyla, the Spirit of the Night, and, as a punishment, Sylphy becomes a slave until Lyla is trapped again in the orb. Key Points…”
— a player, Steam review · 42 hrs played“if you turn off your instinct and let it play out Sylphy will handle everything... and surprisingly this was really good i had a good time playing this game.. gameplay is pretty nice that some of the questlines and events have their own unique gameplay... tag with a cute and…”
— a player, Steam review · 12 hrs playedPrice tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-28. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-28). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
The Imperial Gatekeeper by Tengsten
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/32398519/199f0630bd359a0a0735472ac9caeb8d3a0b23d1.png We're delighted to reveal that we will be releasing The Imperial Gatekee
Magical Girl Celesphonia Slated for May 7!
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/32398519/c99467a8cb9f01e9e1b677e2dab90c1e47adb014.jpg We're thrilled to reveal that we will be releasing Magical Girl Celespho
The Heart of Darkness Trading Cards and More!
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/32398519/72b6149ffabb30ff209645980c11139a2fa0878b.jpg We're excited to announce that we have enabled Steam Community Items for
Castaway of the Ardusta Sea by baron sengia
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/32398519/dfbfa97848b3ce2e60fd4446d7f5f7c91b9949e5.png We're ecstatic to reveal that we will be releasing Castaway of the Ardus
The Heart of Darkness Is Now Available!
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/32398519/f19bedc92a539395bf02a9173c339fec0890e4c4.png We're thrilled to reveal that The Heart of Darkness by BigWednesday is n
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-27.
| Genres | Action, Adventure, Indie, RPG, Simulation |
| Player tags | RPG · Adventure · Anime · Action · Simulation · Singleplayer · Sexual Content · Indie · Nudity · Female Protagonist · Hentai · JRPG (SteamSpy community voting) |
| Features | Single-player · Steam Trading Cards · Steam Cloud · Family Sharing |
| Languages | English, Japanese, Simplified Chinese |
| Official site | https://www.kaguragames.com/ |
Minimum system requirements (PC)
Minimum: OS *: Windows® 7/8/8.1/10 Processor: Intel Core2 Duo or better Memory: 4 GB RAM Graphics: DirectX 9/OpenGL 4.1 capable GPU DirectX: Version 9.0 Storage: 1 GB available space Additional Notes: OpenGL ES 2.0 hardware driver support required for WebGL acceleration. (AMD Catalyst 10.9, nVidia 358.50)