sledge

The premium Open Source alternative to Valve Hammer Editor

🎯 Best for:Level designers working on Half-Life 1 mods or Goldsource-based projects.

What is sledge?

A modern, multi-threaded map editor designed for the Goldsource engine, replacing the legacy Hammer 3.x tools. It features improved brush manipulation, a modern UI, and enhanced rendering capabilities for level designers.

Tech Stack
C#Game Development

Why sledge?

  • Modern 64-bit architecture
  • Superior brush toolset
  • Native support for modern Windows

Limitations

  • No longer in active development
  • Limited to Goldsource engine
  • Missing some niche Hammer plugins
2/21/2026
Last Update
86
Forks
87
Issues
BSD-3-Clause
License
Financial Leak Detected

Stop the "SaaS Tax"

Your team could be burning cash. Switching to sledge instantly boosts your runway.

Competitor Cost
-$1,440
/ year (est. based on Valve Hammer Editor)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%

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