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PlatformDOS, Windows, Linux
Release date1990-05-17 (v0.5)

UNLZEXE is a program that decompresses LZW compressed executables. It is notably used to decompress Commander_Keen_1-3 or Catacomb executables before they can be patched. There is a 16-bit and 32/64-bit version available.

! Linking to the original project page (if it still exists) instead of the SourceForge one


DOS Version

If using the old, 16-bit version, you can simply drag-and-drop the compressed executable onto UNLZEXE. Successful decompression is heralded by the creation of a .OLZ file (Which contains the old, compressed file.) This works on most windows systems up to Windows Vista. Otherwise it must be run in DOSBox using the following commands:

Z:\>mount c "C:\the directory\the game is in"
C:\>unlzexe keen1.exe

x86 / x64 Linux or Windows Versions

In those versions you don't need DOSBox or mount anything. Just the following:

unlzexe file.exe

It will generate file.exenew which is the extracted version. You can also use the drag and drop method here on any windows version!

NOTE: 64-bit Windows versions should be able to use the Win32 version.


! Link to the source code