For campaign players, the combination of Infinite Health + One-Hit Kill completely neutralizes the infamous "A Fork in the Road" and "Suffer With Me" missions. For Zombies enthusiasts, freezing zombies allows for leisurely Easter egg hunting on maps like TranZit or Mob of the Dead. Disclaimer: The following is for informational and archival purposes. Modifying game software may violate the game’s EULA. Use at your own risk.
Trainers work by injecting code into active processes. This behavior is identical to malware. Your antivirus will almost certainly quarantine the file. Add an exception to your game folder and trainer folder before extracting. Call Of Duty Black Ops 2 Trainer Version 1.0.0.1
Because this trainer is over a decade old, the original websites (e.g., GameCopyWorld, Cheat Happens) have changed. Look for file hashes (MD5) posted in dedicated subreddits or archive.org repositories. The filename is often BO2_Trainer_1.0.0.1.exe . For campaign players, the combination of Infinite Health