This package contains the files to run a FreeBSD Half-Life
Counter-Strike server under Linux emulation with the TSC modification

[from developer's site]

TSC is a server side modification to CS and the half life server
system. It adds more features and effects to the CS experience. 
Features included in this release are:

-AIMBOT PROTECTION - USERS WILL BE DISCONNECTED!!!  [automatically
enabled]
-Optional model and sprite enforcement controlls with various
enforcement levels.
- OGC 5.0a blocked
- lots more

Visit these following web pages for more information:

WWW: http://tsc.austin2600.org/