There are a maximum of 12 Defender achievements worth 743 (200)
3,520 tracked gamers have this game, 41 have completed it (1.16%)
Achieve a score of 15,000 during an Xbox Live CO-OP game.
Unlocked by 479 tracked gamers (14% - TA Ratio = 2.70)
Do you have a question about this achievement? Please post it in the Defender Forum