Gigawatt Valley is a datacenter builder: one river valley, a few villages, and a company that has to keep thousands of GPUs powered, cooled and connected while the neighbours, the weather and four rival clouds push back.
The first version came out on 30 October 2026, and it has been updated almost daily since. The changelog has every release.
Under the hood
Engine
Pure C11 on raylib 6.2, with cJSON for saves. No game engine underneath.
Browser build
The same code compiled with Emscripten to WebAssembly and WebGL 2. Saves go to IndexedDB.
Rendering
A lit low-poly shader with sun shadows, night lighting and weather, under an orthographic isometric camera.
Simulation
Union-find utility networks, power dispatch cleanest first, and smog and noise fields that drift into the villages.
Saves
One JSON save per game with a thumbnail, written whole or not at all. Saves from older versions keep loading.
Testing
A self-test of every mechanic, a scripted player that clicks through the game like a person, and another that plays every scenario for stars.
Platforms
| Platform | Status |
|---|---|
| Browser | Playable now on this site. |
| Mac | A signed, notarized app for Apple Silicon and Intel (macOS 11 or later). |
| Windows | A 64-bit build that follows your display scale. |
| iPad | A touch build: tap, drag, pinch and twist. |
| Steam | Being prepared. Preview the store page. |
Credits
- Town buildings, vehicles and props: Kenney and KayKit (Kay Lousberg), both CC0.
- Title typeface: Michroma (SIL Open Font License). Newspaper and interface type: DejaVu.
- Music and sound effects: creators on Pixabay, credited one by one in CREDITS.md.
- Made with Claude.