Download BSPSource Decompiler, BSPSource map decompiler based on VMEX

BSPSource is a map decompiler for Source engine maps, written in Java. It decompiles .bsp map files back to .vmf files that can be loaded in Hammer, Valve's official level editor.

BSPSource is based on a reengineered version of VMEX 0.98g by Rof, which is no longer developed and lacks support for newer Source engine games.

Improvements and changes compared to VMEX 0.98g

Support for more and newer Source engine games up to Dota 2.
Support for new entity types:
func_areaportal
func_areaportalwindow
func_occluder
info_lighting
Support for the tools/blocklight texture.
Support for compressed and big-endian encoded maps (XBox 360, PS3)
Decompiles VMEX maps flagged with protection and at least detects other anti-decompiling methods.
Improved support for prop_static and info_overlay.
Improved console output.
New graphical user interface with output window.
New command line interface.
New integrated pakfile extractor.
Numerous bug fixes.
Open source.

Limitations and known bugs

Some internal entities that are entirely consumed by vbsp can't be restored. This includes following entities:
func_instance
func_instance_parms
func_instance_origin
func_viscluster
info_no_dynamic_shadow
Areaportal and occluder entities are somewhat difficult to decompile and sometimes have missing brushes or wrong textures.