Zombie Reaper 3 v 1.5 (Mod Apk Money)  Most Important Tips:
★Shoot the head
then one bullet can make target dead
★Shoot fast
then you can get higher score
★When you face the boss zombie
then destroy his helmet first
★Bullet can pass through walls
then you can kill zombies without seeing... http://www.apkformod.com/zombie-reaper-3-v1-5-mod-apk-money/