It'll Cost Ya
You made a taxi trip from one island to another without skipping.
12/6/2012
6:53:27 AM
Rare 11.5%
Lean With It
Killed 25 enemies while using peek and lean during the Campaign
11/20/2012
4:59:22 AM
Rare 15.7%
Double Header
Killed two enemies with one bullet in the Changing Tides mission
11/20/2012
2:31:05 AM
Rare 25.6%
It's Dangerous to go Alone!
Requested ammo from an Ally in the Campaign
11/20/2012
1:57:51 AM
Common 81.4%