Playing Counter-Strike against cheaters is not fun. Who plays CS knows how frustating is when someone starts killing everyone without missing a single shot.
sXe Injected prevents the use of softwares that facilitate the game. It blocks wallhack (see through walls), speedhack (very high speed), aimbots (sights always fixed on the head), among others. It was developed to work with the Half-Life 1 engines (CS 1.5 and 1.6, Day Day of Defeat, Natural Selection, Team Fortress Classic, etc.).