Download Sledge Editor

SLEDGE DOES NOT SUPPORT THE SOURCE ENGINE
The Sledge Editor currently only works on Goldsource - that is, the Half-Life 1 engine from 1998. It does not work on HL2, CSGO, Gmod, or any other Source-based game.

What is Sledge?
Sledge is a completely free and open-source replacement for Valve's Hammer Editor, with a focus on compatibility with the Goldsource engine. The purpose of Sledge is 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.

Advantages of Sledge

• Sledge brings many editing features available in Hammer 4 into the Goldsource editing environment.
• It is built using modern frameworks and libraries, and is tested on modern operating systems.
• It is 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.

• Runs on modern operating systems and graphics cards
• Can take advantage of multiple monitors
• Full support for Goldsource editing
• Reads and writes RMF, MAP, VMF files
• Complete compatibility with Hammer maps
• Proper decimal precision for sub-grid geometry
• Support for large maps
• Support for multiple visgroups per object
• Automatic visgrouping
• Improved texture browser filtering and display options
• A huge number of settings to customise to your liking
• ...and much more!

Sledge Public Beta
Sledge is currently in beta stage, so it may be unstable and some features are missing. Missing features include:

Model loading
Cordon clipping during compile
Built-in support for prefabs/instances
Automatic detection of game configurations
Source Support
The current milestone is to fully support Goldsource editing. Once HL1 editing is stable, work to add support for Source will begin. Sledge does not support Source currently.

Future Possibilities
Because Sledge is open source, the possibilities for future expansion are endless. Some popular ideas include 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!