APK MOD INFO
Name of Game: Nightmare: Malaria
VERSION: 1.1.2

Name of Cheat/Mod/Hack (credits: wendgames):
-UNLOCKED

Nightmare: Malaria MOD APK 1.1.2 (Unlocked)

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