Navigate to your game directory (usually Steam/steamapps/common/Call of Duty Black Ops/mods ). Move the extracted folder directly into the mods folder. :
rar l Xtrem.rar
Designed for veteran players who want to test their skills on maps like Kino or Five. How to Install Backup your files: Always keep a copy of your original common_zombie_patch.ff or relevant game data. B.ops.z.mode Xtrem.rar B.ops.z.mode Xtrem.rar --l
The mod typically unlocks all maps, weapons, perks, and achievements instantly. B.ops.z.mode Xtrem.rar --l
If you must run it: