Once the files are moved, you should use the new executables provided by the client rather than the standard Steam launcher. For Zombies : Run the executable often named Plutonium-bootstrapper.exe For Multiplayer

: Ensure you have the base game files for Call of Duty: Black Ops II installed on your PC.

Unlike the official game, custom offline clients do not auto-update through a launcher like Steam. You are responsible for keeping it updated.

: To allow offline play with bots in Multiplayer or solo/LAN play in Zombies. Key Components : T6 Client : The engine mod (like Plutonium or Redacted).

: Custom launchers are often flagged as "false positives." You may need to add the folder to your exclusions. ⚙️ Installation Steps Extract the Files Download the v37z client Extract the contents (usually a folder containing files) into your main Call of Duty: Black Ops 2 root directory. Run the Launcher Locate the file often named (Multiplayer), (Zombies), or a unified launcher like BO2Offline.exe Right-click the file and select Run as Administrator Configure Your Profile

| Error | The Fix | | :--- | :--- | | | Your main folder is missing localized_english_iw37.ipak . Copy it from Steam. | | "UI failed to load." | Delete %LOCALAPPDATA%\BO2Offline\ui_cache . Restart. | | No servers in LAN list. | You need RADMIN VPN or ZeroTier . This client requires a virtual LAN. | | Crashes on "Mob of the Dead" | Lower Texture Quality to "Medium." The v37Z renderer hates High shadows. |

You need the legitimate game files from a legal copy of Black Ops 2. This client does not download the 18GB of assets for you; it patches existing files. If you download a "pre-installed" version of this client, ensure your antivirus does not quarantine the .exe files (they often trigger false positives due to DLL injection).