Flash.
Most "OpenGL" cheats for CS 1.6 follow a standard feature set, often controlled by the function key: Wallhack (F1) : Cycles through different transparency or "X-Ray" modes. No-Flash/No-Smoke cs 16 opengl32dll wallhack f1 work
. These plugins scan the client's directory or check if the player's OpenGL version matches known "clean" versions; if it doesn't, the player is automatically kicked or banned. if it doesn't