Kill 30 enemies using your sidearm

Participate in any multiplayer match

Kill 15 enemies with a stealth kill

Complete any single player mission without using med kits, but taking damage

Kill all enemies in the beach houses without causing an alarm ("Leave No Man Behind")

Kill 20 enemies from a distance of 600m or greater

Kill 50 enemies while holding your breath

Completed the Epilogue.

Found an old friend.

Completed Wyatt's Chapter.

Completed Shel's Chapter.

In Mob of the Dead, open a door without spending points.