: There is no official APK provided by Valve. Downloading pre-bundled "APK + Data" packs from unverified websites carries risks of malware. Using your own licensed files via Xash3D is the safest method.
None of these are CS:CZ, but they are safe, run natively, and have online multiplayer. counter strike condition zero for android apk data
To run CS: Condition Zero on Android, your device must meet certain hardware and software criteria: Generally works on Android 4.4 and above. : There is no official APK provided by Valve