Counter Strike 1.4 |link| Here

Counter-Strike 1.4 was , when CS 1.5 was released. 1.5 fixed nearly all of 1.4’s netcode problems, kept the anti-jump-shooting mechanics, and became the standard for online play until Steam forced 1.6 in 2003.

Version 1.4 is notorious among veteran players for implementing drastic changes to the game physics, designed to curb "bunny hopping" and slow down the overall pace of the game. counter strike 1.4