MAG

You need to earn at least 40 ribbons (out of 48). Considering every ribbon can't fit in this trophy guide, I advise you to refer to the Ribbon Guide which provides tips and tricks on how to get each ribbon. Since 1.06, the Interdiction pack added 4 ribbons, and you can get some DLC ribbons instead of some annoying ones (like 30 bunker turret kills). For two of them, you don't even need to buy the DLC to obtain them.

4 new ribbons were added in the 2.00 update (getting a total of 48) but they can't be obtained if you didn't buy the Escalation DLC.