APK MOD INFO
Name of Game: Plan Z
VERSION: 2

Name of the cheat, mod, or hack (credits: wendgames):
-Unlimited Ammo and Health

Plan Z MOD APK 2 (Unlimited Ammo and Health)

Download the CACHE file/OBB file. They should be .zip or .rar files.
Extract the file to your sdcard.
Move the extracted folder to the location: /sdcard/Android/obb