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AI & Hardware

Hatchet Harry’s - On-Device AI Axe-Throwing Game

A projection-based axe-throwing game that runs entirely on a custom IoT device. A camera and on-device vision score every strike as it lands. No server involved.

Visit hatchetharrys.co.uk ↗
12 mo
Concept to live venues
On-device
IoT edge inference
0.99
Detection confidence

The Challenge

A venue wanted an axe-throwing game that scores itself and projects onto the wooden target. The room fights you: light shifts through the evening, players move across frame, the axe spins, and safety netting sits between the camera and the board. It also had to run on affordable hardware at every lane, with nothing in the cloud.

Our Approach

A computer-vision model trained to find the axe head in real time, through motion blur, changing light, and a busy background.

The whole game, detection through projected UI, compiled onto one local IoT device per lane.

Projection-mapped target and scoreboard aligned precisely to the physical wooden board.

On-device inference and calibration tuned for low latency so scoring registers the instant the axe lands.

Outcome

Live in venues today, scoring throws at 0.97 to 0.99 confidence with no server behind it. Twelve months from idea to paying customers, on hardware we built.

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