Hi this achievement is for completing the Zombie Guidance Counselor level on crypt city with out using your Zombie Powers LT/RT WHEN you glow blue
what i did was pick up the orb run to a crypt placed the orb then run back to meet the minions and mash the B button if you get over run just stand by the orb and mash the B button . if you have missed this on your first playthrough just replay the level by way of load game chapter book .