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Hammer++ is a community-made modification of Valve Hammer Editor for Source engine that provides an updated, feature-rich version of the editor. The trailer and website can be found at the following link: http://hammerplusplus.com/.

Hammer++ currently supports the following branches of Source engine:

Note.png Note: Games based on these engine branches can still work with the editor by installing the appropriate version. For example, the editor can be used with Day of Defeat Day of Defeat: Source by installing the Source 2013 MP branch. For Garry's Mod Garry's Mod, this tutorial must be followed instead.


  • Accurate lighting preview
  • Upgraded graphic fidelity
  • Significantly better stability
  • Particle rendering
  • 2D + 3D skybox preview
  • New model browser, particle browser, color editor and keybind editor
  • Realtime display of fog and ropes
  • Variety of new tools such as physics simulation, gizmo manipulation, drawing of polygon shapes and convex brush merging
  • New func_instance tools
  • Quality of life improvements
  • ... and much more!

A more detailed feature list can be found on the website and you can support ficool2 via Ko-fi