Launch via the designated MP client executable to access local matchmaking configurations and unlock all weapons offline.

9/10 (Deducts one point because the installer requires you to disable Windows Defender, which feels like trusting a zombie not to bite you).

(BO2). This client is typically used to play Singleplayer (SP), Multiplayer (MP), and Zombies (ZM) without needing an internet connection or official servers. The Role of Offline Clients in Legacy Gaming

The installation of a custom client like V37Z typically involves several critical steps to ensure the software integrates correctly with the original game files. Most users begin by ensuring they have a clean installation of the base game. Because these clients modify how the game executes code, they are often distributed as a collection of executable files and dynamic link libraries (DLLs) that must be placed directly into the game's root directory. The "V37Z" iteration specifically aims to streamline this process, often including a dedicated launcher that bypasses the standard authentication servers, allowing the game to run in a "LAN" or "Local" state.

and ensure the language files are correctly placed in the root directory to avoid launch failures. Steam Community you're seeing during the install?

Select all the contents inside the extracted v37z client folder.