Who doesn’t like 30 gamerscore?!? I know I do and this achievement is most likely an achievement you will unlock after a few times playing the new Mob Of The Dead Zombie map that appeared in Black Ops 2 new Uprising DLC!!
The achievement, “GG Bridge”, required you to complete a whole round (round 15 or higher) on the bridge! It is very simple but this guide is really built for those who are struggling with the achievement!!