Build a keep, grow through four eras, and survive 12 brutal nights
Voting opens Nov 7, 2026, 5:00 PM
Holdfast is a base-building survival game. You start with a campfire and a few workers. You end with a kingdom.
By day, gather wood, stone, iron and gold. Build farms, camps, mines, walls and towers. Train soldiers and archers.
By night, monsters come for your keep. Goblins and wolves rush in. Orcs and trolls smash walls. Rams break gates. Bosses arrive later.
Everything you see and hear is made in code. No image or sound files.
Can you survive all 12 nights?
Goal: survive 12 nights. If your keep falls, you lose.
The challenge is "FUN game", so Holdfast is built around a loop that is fun to repeat.
The goal is simple: survive all 12 nights.
Design and code: Mateusz. All pixel art, sound effects and music are generated in code at runtime.
The code was written with Claude Code (AI). There are no art or audio files: all graphics are drawn procedurally and all sound is synthesized by that code.
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