Connect all participating PCs to the same network switch or router via Ethernet cables (or the same local Wi-Fi network). An active internet connection is not required; the router just needs to assign local IP addresses.
In Team Deathmatch, set Friendlies and Enemies to your liking. In some versions, you can set max enemies and keep friendly bots at one to make it feel like a standard match. Alternative Methods for Offline Play
: Create an account on the Plutonium website and download the launcher. Connect all participating PCs to the same network
If you lose internet completely, launch the Plutonium launcher using the command-line argument -lan or select the offline mode toggle in the launcher settings to start the game without an account. Option B: The BGi Offline Mod (No Internet Required Ever)
: Use tools like the Classes Customize Tool to choose maps, guns, and skills that are typically locked in the base game's limited offline modes. In some versions, you can set max enemies
This method strips the game of Steam authentication, allowing the multiplayer map launcher to run locally.
Locate a clean, unmodified version of the Call of Duty: Black Ops 1 game folder. Many custom clients provide legal torrent files or direct download links for the base game files on their official forums. Option B: The BGi Offline Mod (No Internet
While the base game can be played offline, modern community-driven tools offer a better experience. Below is a comprehensive guide to getting BO1 multiplayer working offline, including the "free" method (using Plutonium) for accessing the full, refined multiplayer experience. Method 1: The Modern & Free Way (Recommended: Plutonium T5)
Plutonium allows you to link your own game files. If you do not own the game on Steam, community guides on the Plutonium forums provide legal torrent links to download the clean, unmodified Black Ops 1 (T5) game files for free. Download these files and place them in a folder on your hard drive. Step 3: Configure Plutonium for T5 Open the Plutonium Launcher and log in. Navigate to the (Black Ops 1) tab.