Most of these probably don't work fully, but they at least boot on GMod 13.
If you want to port more versions from the original folder, dm me on discord (figardo#1700) and I'll add them here.

Versions that are here:
020909 - first release (available on the workshop)
021009 - one month after release (includes early version of the equipment menu and number code c4)
110210 - includes the footstep scanner, an item cut just 11 days later
v1 - first "numbered" release (since it was getting close to being included in gmod)
v9hg639 - the latest version that bku provided