Achievement Help Requests

What Does This Button Do? in Gears of War 3

View guide to getting this achievementWhat Does This Button Do?106 (50)

1 gamer needs helpOnline/Offline - These achievements can be obtained in either an online or offline mode.Single Player - These achievements can be obtained using a single controller.Cooperative + - These achievements can be obtained using two or more controllers/profiles and both players will earn the achievement if both players have met the requirements.Cumulative - These achievements are obtained by repeatedly performing a single action over time.Shop - These achievements can be obtained by purchasing an item or a series of items as prerequisites from a shop. Get 500 Silverback rocket kills in Horde (any map, any difficulty).

Gamers needing help

Gamer Message
fam25 fam25 I currently have over 2800 rocket kills with the silverback.I have deleted the systems cache, and re-uploaded my horde command pack dlc but it doesnt pop.Anything else i can do to obtain this achievo?