Friendship Rules
Revived someone from "Fight for Your Life!" that is on your friends list
9/22/2012
12:24:27 AM
Rare 25.2%
Aerial Superiority - Kill 5 Helghast while in the air
Killed 5 Helghast while airborne using the Jetpack
8/27/2012
7:29:24 PM
Very Rare 7.2%
Never There - Sneak past Helghast
Sneaked past all Helghast in the Jungle without alerting any of them
8/22/2012
6:33:19 PM
Very Rare 9.9%
Stranded Together - Reach the Extraction Point in Co-op
Made it to the Extraction Point in Co-op mode
8/22/2012
6:03:57 PM
Rare 14.5%
Mopping Up - Kill 40 Helghast foot soldiers
Killed 40 or more Helghast foot soldiers on the beach
8/22/2012
2:15:51 AM
Very Rare 6.5%
Double Trouble - Reach the river in Co-op
Made it to the Corinth River in Co-op mode
8/22/2012
2:10:32 AM
Rare 20.2%
It Goes to Eleven
Earn at least 1 star in 11 different Special Op missions.
7/9/2012
8:45:48 PM
Rare 17.0%
50/50
Complete a Special Ops Mission Mode game with the same number of kills as your partner.
6/30/2012
3:59:04 AM
Very Rare 7.1%
The Big Apple
Complete "Black Tuesday" and "Hunter Killer" on Veteran difficulty.
6/25/2012
12:47:18 AM
Ultra Rare 4.1%