No legitimate version ever included nvidia in the filename. The closest official mention is the folder path sometimes being /sdcard/Android/obb/com.valvesoftware.halflife2/ and the game using NVIDIA’s Tegra graphics libraries internally.
If this file is missing or corrupted, the game will fail to launch, usually stuck on a "Downloading Resources" screen or crashing to the desktop. Because Episode Two is a highly scripted experience, the patch file is critical for ensuring that scene triggers (like the G-Man’s appearance or Alyx Vance’s animations) function correctly. The Modding and Preservation Scene patch.32.com.nvidia.valvesoftware.halflife2eps.obb