Tidal Isles · 潮汐群岛

A cottage brings new islanders, but someone has to feed them. A lumberyard works best beside a forest you leave standing. A harbor opens new opportunities and consumes food you may need when the weather turns.

Tidal Isles is a compact, single-player building strategy game. Each turn gives you one action and a hand of building cards. Pick a site, check the projected balance, and decide what your island needs next.

• Fifteen-turn runs with a definite ending.
• Sixteen buildable structures and three goals: Thriving Community, Living Coast and Voyager Harbor.
• Resource production, adjacency bonuses, processing costs, meals and storms calculated from the island you build.
• Standard and Relaxed modes, plus a daily island shared by UTC date.
• Choose permanent perks during the run.
• Local autosave, JSON import/export and local run records.
• English and Simplified Chinese, keyboard navigation, sound controls and reduced-motion settings.

There is no online leaderboard or cloud save. Your records stay in the current browser.

Download and run

Download all four files: the HTML game, start.mjs, START-HERE.txt and THIRD_PARTY_NOTICES.txt. Keep them together in one folder.

1. Install Node.js 22.18 or newer.
2. Open a terminal in that folder and run node start.mjs.
3. Open http://127.0.0.1:4182 in a current desktop browser.

No package installation or API key is needed. The verified setup uses a local HTTP server and Chromium on macOS. Opening the HTML directly is unverified. Native mobile apps and Steam Deck compatibility have not been verified.

This is a small, complete game with finite content. Use JSON save exports to back up your progress; clearing browser data removes local saves.

AI disclosure

Generative AI was used to create code, game text and graphics expressed as SVG code. Audio is synthesized procedurally in the browser. No generative model runs while you play.

中文介绍

十五轮潮汐，建起一座小岛。选择建筑、安排邻接、照料岛民，撑过三场风暴。

多盖一间小屋，岛上就多了居民，也多了每天要准备的饭。伐木场需要旁边留下森林，港口能带来繁荣，却会吃掉你为风暴储备的粮食。

每轮只有一次行动。看看手里的蓝图和接下来的天气，选一块合适的地形，再决定这次是扩建、补粮，还是为下一轮留出余地。

游戏有 16 种可建造建筑、三种目标，以及标准、轻松和每日岛屿模式。产出、加工、邻接加成、居民消耗与风暴损失都由实际布局决定。十五轮结束后检查目标，给出明确胜败和得分。

支持本地自动存档、JSON 导入导出、中英文切换、键盘操作、音效开关和减少动画。每日岛屿按 UTC 日期生成，成绩只保存在本机。

下载与运行

请下载全部四个文件并放在同一文件夹。需要 Node.js 22.18 或更高版本和桌面浏览器。在文件所在目录运行 node start.mjs，再打开 http://127.0.0.1:4182。无需安装 npm 依赖或配置 API Key。

这是内容有限、单局流程完整的小游戏。目前没有原生手机安装包，也未验证 Steam Deck。请定期导出 JSON 存档；清理浏览器数据会删除本地进度。

代码、游戏文本和以 SVG 代码表达的图形使用了生成式 AI。音效由浏览器中的程序实时合成，游玩时不调用生成式模型。