Kill 100 Human Enemies.

Use a Medkit 75 times.

Kill 30 human enemies in close combat.

Shoot out a tire on 15 different vehicles

Perform 10 vehicle take downs

Destroy 2500 airborne enemies

Collect 5,000 crystals

Kill every type of enemy (doesn't include boss battles)

Get stuck in a door

Disable three switches within 1 second

Earn the highest tier of completion in 10 public events.

Complete a Strike without anyone in your fireteam dying.

Kill 25 Fallen with precision shots in 1 mission without dying.