This document provides a 5-step strategy for reaching level 15 in the Ascension zombies map in Call of Duty: Black Ops. The steps include: 1) Knifing zombies at windows on the bottom and upper floors. 2) Opening doors on the upper floor and proceeding up stairs. 3) Buying mystery boxes until out of money. 4) Defending on an upper platform until level 6 is over. 5) Relying on dedicated friends to find mystery boxes and defend from levels 8-15.