1) Install the APK. Install APK with omp postfix if you have multi-core device and noomp if you have single-core device or have problems with omp version.
2) Install the latest Xash3D Android from https://github.com/SDLash3D/xash3d-android-project/releases/latest.
3) Copy cstrike and valve folders from your Steam CS1.6 installation to xash folder on SDCard.
4) Run CS16Client!
NOTE: Delete any PAK files with name starting with “touch” or “vgui” in cstrike folder.