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BSPSource is a GUI map decompiler for Source games, written in Java.

Based on VMEX, it converts BSP files into VMF ones that can be loaded in Hammer. It also includes numerous bug fixes over VMEX and new features for doing the conversion, such as extracting embedded assets, processing multiple BSPs at once, and more.

Bug:Newer version (1.4.4) may not launch on some systems. Users can try to install Java 19 (or later) and download the bspsrc-jar-only.zip version and run the bspsrc.jar file, or alternatively, use older version of BSPSource.  [todo tested in ?]

Note:Due to technical reasons, decompiling maps doesn't accurately recreate their original VMF state, often presenting issues such as invalid geometry solids or misplaced areaportal brushes in the decompiled file.

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Note:Depending on the decompilation protection present in some community-made maps, the conversion may be more difficult to work with.

BSP with File Packing

In the tab "Other" set tick in in "Extract embedded files". Then put downloaded files in game directory.

BSPInfo

BSPInfo is a mode of BSPSource that instead of decompiling .bsp files, analyses them. Content such as: bsp version, compression type, checksums, AppID, lumps and compile parameters. It can also extract embedded files similiarly to GCFScape.

External Links

• BSPSource on GitHub
• Java 19 (or later) (optional, for 1.4.4 or later. This is only required if you are using bspsrc-jar-only.zip (which does not have Java bundled in.)
• Java 8 (required in order to use BSPSource 1.4.3 or earlier)