孤岛海妖 The Sea-demon

Detective visual novel with seven proposed solutions to one mystery

章鱼罐头制作组 · Released Jan 5, 2023

Reviews: Very Positive; 86% of 210
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 3 years ago; Feb 20, 2023
Minimum PC: 1 GB RAM · 2 GB disk; Full requirements

What is 孤岛海妖 The Sea-demon?

You play a mystery enthusiast who joins four detectives on an island to investigate a six-year-old sea-demon case within twenty-four hours. In this story-focused visual novel, you gather evidence around the island and select appropriate clues during the detectives' deductions.

For you if...

+you enjoy anime-style mysteries with a female protagonist
+you want a standalone story without playing earlier games

Not for you if...

−you want frequent interaction rather than long stretches of reading

Screenshots and trailer

孤岛海妖 The Sea-demon system requirements

Minimum: 1 GB RAM, 2 GB of disk space.

As published by the developer.

Can my PC run 孤岛海妖 The Sea-demon?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

Memory: 1 GB RAM
Storage: 2 GB available space
DirectX: Version 10

Does 孤岛海妖 The Sea-demon have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does 孤岛海妖 The Sea-demon run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 7
Steam features: Cloud saves, Family Sharing
Languages: Text only: Simplified Chinese.

Does 孤岛海妖 The Sea-demon use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam