In the Android ecosystem, an OBB file contains the heavy lifting of a game: the textures, sounds, and map data. The "22" in the filename refers to the specific version code of the Half-Life 2 build.

If using an older, direct Nvidia Shield emulator or direct APK launcher: Navigate to your device's internal storage: /Android/obb/ .

Setting up Half-Life 2 via the source engine launcher requires precise folder placement and asset merging. Step 1: Establish Your Directories