APK MOD INFO
Name of Game: Rambo
VERSION: 1.0

Name of the cheat, mod, or hack (credits: wendgames):
-Mod Ammo/No Damage

Rambo MOD APK 1.0 (Mod Ammo/No Damage)

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