You were successfully promoted up a rank in multiplayer.

Travel to an incredible height

Be among the first 10 people to complete a community level

Outside Science Center, defeat each sniper guard with one shot.

You completed the mission "Roman's Sorrow".

Kill Radec at Visari Palace within 20 minutes

Destroy any Helghast APC during battle

Destroy all Leech Pods in The Cruiser

Kill 500 Helghast Soldiers

Kill the Tharsis Refinery ArcTrooper in under 1 minute 30 seconds

Revive your buddies a total of 25 times

Complete Salamun District on any difficulty level