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%