Build an unstoppable bulldozer in secret. Then prove it. A two-phase game about quiet nights in the workshop and one very loud morning. Inspired by a true story.

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Planned Release Date: 2026

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About This Game

Granby, Colorado. 2003.

The dozer didn't sell at auction. Nobody wanted it. Now it sits in your workshop. You have a grudge, a welding torch, and thirty-five thousand dollars.

PHASE 1 — THE WORKSHOP

A man alone in a garage at 2am.

Spend on armor, engine, cooling, treads, cameras. Every upgrade draws suspicion. Every day costs cash. The neighbor peers over the fence. The hardware clerk asks too many questions. An inspector heard the welding. A reporter's been asking about your zoning dispute.

You cannot afford everything. Every run is a conversation about what to sacrifice.

PHASE 2 — THE RECKONING

Drive. Destroy. Survive.

Six priority targets. One machine. Six thousand kilograms of concrete and steel on tank treads. Ram buildings at speed — heavier armor and stronger engines turn walls into dust. Heat builds as you demolish. Overheat, and the engine stalls for three long seconds while the sirens close in.

Every choice you made in the workshop plays out here. The cooling you skipped. The cameras you couldn't afford. The armor that's keeping you alive.

FEATURES

  • 30–45 minute complete runs — built for a single evening

  • Five upgrade paths that reshape how the rampage plays

  • Twelve branching workshop events with real consequences

  • Force-based destruction physics — mass and momentum matter

  • Escalating police response across five wanted levels

  • Original soundtrack with adaptive music across three phases

  • Save anytime, resume mid-workshop

A NOTE ON THE SOURCE

This game is a work of fiction inspired by a real event. On June 4, 2004, Marvin Heemeyer drove a modified Komatsu D355A through Granby, Colorado. No one else was killed. The grievances, the machine, and the man were real.

Project Haymaker is not about celebrating what he did. It's about understanding how someone gets there — and handing the wrench to the player.

"Sometimes reasonable men must do unreasonable things."

Mature Content Description

The developers describe the content like this:

Depicts a man losing his mind and going on a non-lethal destructive rampage with a bulldozer

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS *: Windows 7+ (64-bit)
    • Processor: Intel Core i3-4000 / AMD equivalent (2 cores, 2 GHz)
    • Graphics: Integrated graphics (Intel HD 4000 / AMD Radeon R5)
    Recommended:
    • OS: Windows 10/11
    • Processor: Intel i5-6500 / AMD Ryzen 5 1500X (4 cores, 3+ GHz)
    • Graphics: GTX 960 / RX 470 or modern integrated (Intel UHD 630)
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
    Minimum:
    • OS: macOS 10.12+
    • Processor: Intel Core i3-4000 / AMD equivalent (2 cores, 2 GHz)
    • Graphics: Integrated graphics (Intel HD 4000 / AMD Radeon R5
    Recommended:
    • OS: macOS 11+
    • Processor: Intel i5-6500 / AMD Ryzen 5 1500X (4 cores, 3+ GHz)
    • Graphics: GTX 960 / RX 470 or modern integrated (Intel UHD 630)
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Linux x86_64
    • Processor: Intel Core i3-4000 / AMD equivalent (2 cores, 2 GHz)
    • Graphics: Integrated graphics (Intel HD 4000 / AMD Radeon R5)
    Recommended:
    • OS: Ubuntu 20.04+
    • Processor: Intel i5-6500 / AMD Ryzen 5 1500X (4 cores, 3+ GHz)
    • Graphics: GTX 960 / RX 470 or modern integrated (Intel UHD 630)
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