BSP2MAP is a decompiler for HL1-engine (called Goldsource) maps written by Skyler 'Zipster' York. It converts the BSP files into .MAP format, which can then be loaded into Hammer Editor. Unfortunately, Goldsource maps do not store as much information about the original brushwork of a map as HL2 does, so the geometry has to be recreated using the polygons. Unlike WinBSPC, BSP2Map produces a far more accurate source-to-map conversion. However, it does hollow out all brush-based entities with a thickness of one unit as a preventive measure to stealing/copying maps.
- BSP2MAP Download @ TheRaZZeRApp