This is the most efficient method. It uses an engine that mimics GoldSrc (the original engine for CS: CZ). You install the Xash3D FWGS app and a dedicated CS16Client APK, then move your original game data from a PC to your phone.
The biggest hurdle is touch controls. Condition Zero was designed for mouse/keyboard. Here is the optimal touch layout for portable play: counter strike condition zero for android apk data portable
While I can’t provide direct download links, here’s a about how such a setup might work and why people look for it. This is the most efficient method
: On your Android device, create a folder named xash . Place both the valve and czero folders inside it. Launch the Game : Open the CS16Client app. counter strike condition zero for android apk data portable