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Sledge Sledge
Skull and crossbones.png No longer being developed
TypeOpen source Third Party Tool
EngineGoldSrc GoldSrc
Obsolete-notext.pngDeprecated:Sledge is no longer being actively developed, and is rather incomplete and buggy; consider using J.A.C.K., TrenchBroom, or NetRadiant-Custom.
Sledge may still be occasionally useful for generating certain geometry with its advanced primitives, but should not be used as one's primary map editor.

Sledge Sledge was a free and open source level editor that supports the GoldSrc GoldSrc engine. The original scope of Sledge was to offer advanced editing features from later versions of Hammer and other editors and make them available to all users, regardless of which engine they choose to use. Sledge uses the same file formats as Hammer does (RMF, MAP, VMF) and maps are compatible between both programs. The editing process is almost identical to Hammer, the hotkeys are the same, as well as many of the screen elements and dialogs. Switching to Sledge will not be difficult for users who are familiar with Hammer.


Icon-Important.pngImportant:Sledge does not currently have many compilation options and an external compiler such as The Compilator or Nem's Batch Compiler is recommended.

Minimum Recommended
Operating system (OS) Windows Microsoft Windows
Processor (CPU) 2.0 GHz dual-core processor
System memory (RAM) 2048MB
Hard disk drive (HDD/SSD) 5GB*
Video card (GPU) OpenGL-compatible graphics card
Other .NET Framework 4.0


  • Sledge included many editing features available in Hammer Hammer 4.x in the GoldSrc editing environment.
  • It was built using modern frameworks and libraries and is tested on modern operating systems.
  • It was constantly being enhanced and new features are always being added.
  • It is open source, which means the source code is available to everybody to modify and improve. ( Even though it is no longer being actively developed its source code is available )


  • Runs on modern operating systems and graphics cards
  • Full support for GoldSrc editing
  • Capable of Reading and writing RMF, MAP, VMF files, as well as its own SMF format.
Icon-Bug.pngBug:RMFs written by Sledge can become unreadable by other editors. Prefer saving in VMF or MAP instead.
  • Complete compatibility with Hammer maps
  • Proper decimal precision for sub-grid geometry
  • Support for larger maps
  • Support for multiple visgroups per object
  • Automatic visgrouping
  • Displays models from unextracted PAK files
  • Improved texture browser filtering and display options during its lifetime

Sledge Public Beta missing content

Note.pngNote:Sledge is no longer being actively developed, however, some features were planned before being cut
  • Model loading
  • Cordon clipping during compile
  • Built-in support for prefabs/instances
  • Automatic detection of game configurations

Possibilities suggested during lifetime

Note.pngNote:Sledge is no longer being actively developed, however, some features were planned before shutting down

When a map is compiled, these features would be converted to GoldSrc compatible brushwork. Some popular ideas included the following:

  • Collaborative editing and multi-user support
  • A plugin system and support for scripting
  • Built-in support for version control systems like SVN and Git
  • Powerful displacement editing tools
  • A complete 'Sledge SDK' containing other editing and creation tools based on the Sledge code base...and anything else you can think of!

Source Support

Note.pngNote:Sledge is no longer being actively developed, however, its 2.0 version was planned to have Source compatibility

The current milestone is to fully support GoldSrc editing. Once the alpha test is complete, work to add support for Source would have likely begun. Full Source support was expected to be released in version 2, but official development was discontinued. So it's unlikely that it would be added in the future. Many Source editing features will be available in Goldsource as well, such as displacements and instances.


External links