There are a maximum of 12 Defender achievements worth 748 (200)
3,631 tracked gamers have this game, 42 have completed it (1.16%)
Achieve a score of 15,000 during an Xbox Live CO-OP game.
Unlocked by 483 tracked gamers (13% - TA Ratio = 2.74)
Do you have a question about this achievement? Please post it in the Defender Forum