Hydraulix989

How does this work? CS 1.6 is closed source, as is HL1 engine?

Bayart

It's a clone with CS maps.

q3k
No, it seems to contain some leaked SDK and reverse engineered code: https://github.com/FWGS/cs16-client/tree/v1.32 , and to run on https://github.com/FWGS/xash3d-fwgs .