The new open source drop-in replacement for Valve's Hammer Editor!

Sledge is currently in public alpha! Alpha builds may be unstable.


Sledge is a completely free and open-source replacement for Valve's Hammer Editor, with a focus on compatibility with both Goldsource and Source engines. 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.

• Windows (XP, Vista, 7, 8)
• Microsoft .NET 4.0
• OpenGL compatible graphics card
• FGD for the game of your choice
Note that WINE/Mono for Linux and Mac is currently not supported, but may be in the future.

• 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
• Displays models from unextracted PAK files
• Improved texture browser filtering and display options
• A huge number of settings to customise to your liking
...and much more

Don't like the colour of the grid lines? Prefer your background colours to be blue? Want to automatically switch to the selection tool after you create a brush? How about changing the hotkeys? Sledge has you covered for all this and more!

The current milestone is to fully support Goldsource editing. Once the alpha test is complete, work to add support for Source will begin. Full Source support is expected to be released in version 2.

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!

Github Repository[github.com]
Download Sledge (v0.1.0.24)[github.com]
TWHL's Official Sledge development thread (last page):[twhl.info]