Achievement Glitched?

achievement glitched it’s suppose to be 25/25 right
http://img809.imageshack.us/img809/9417/73f12fd3d39649cabe12c8f.png
i never got the 80G achievement :frowning:

Try playing the very first Spartan Ops mission again

> Try playing the very first Spartan Ops mission again

This ^^^^ C1,E1.

Play any of the Ep 5 missions again and do it on easy.