Call of Duty: Black Ops 2 – High Maintenance Guide Published by Twice as Worse Games on 02/08/2013 X-Ray and Vav show you how to get the “High Maintenance” achievement in the Revolution DLC for Call of Duty: Black Ops 2 for the Xbox 360 Big thanks to LIVINGDEAD4LIFE, Hmm Blackout and BioHRay for the help!