If you owned CS:GO before it became CS2, you can still run a portable copy by copying the game folder from a legitimate Steam installation and applying a Steam emulator (for educational/offline use only). Be cautious with emulators—use only open-source, well-reviewed ones like or SmartSteamEmu .
: It retained the legendary optimization of the GoldSrc engine, allowing it to run on virtually any PC from that era. counter strike 18 goiceasoft portable