Z1 Battle Royale Guide

How to redeem '3rd Echelon' map - [DEPRECATED; GAMESPOT REMOVED THE PAGE] for Tom Clancy's Splinter Cell: Conviction

https://www.youtube.com/watch?v=LAt9mOa-Jy4&index=9&list=PLJpJ0fBN2DHdVcuEWsUy1PUUOuORBctfU

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