Doom Clone

A playable DOOM-style raycasting game built in a single HTML file with vanilla JS.

Description

A functional 2.5D first-person shooter inspired by DOOM, featuring movement, shooting, and enemies. It was reportedly generated as a "one-shot" creation from a single prompt using Grok 4.5, utilizing a vanilla JS raycasting engine without external libraries. The screenshot shows a faithful recreation of the original game's HUD and sprite-based environment.

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Details

Why this is interesting: A complex 2.5D raycasting engine and complete Doom-like game loop successfully generated from a single prompt.
Attributed to: @AdamLowisz
Built with: Grokfamily Grokfamily
Tags: #fps #raycasting #vanilla-js #retro

Discovered: X
First posted: X · Jul 22, 2026
Listed: Added 1h ago
Build: Moderate
Models: Strong

Prompt

Create a fully playable DOOM game in a single HTML file. Use vanilla JS, no external libraries. Make it look and feel like the original DOOM. Include a player that can move, shoot, and interact with enemies. Add a basic map, enemies, and win/lose conditions. Make sure it's fully functional and playable.

Source

Doom Clone

Description

How it grew

Doom Clone

Description

How it grew