Win all 3 medals on any Festival event.

Overload the shields of 100 enemies.

Eliminate 2 enemies with a single grenade.

Achieve the highest score multiplier.

Promote a multiplayer character to the Galaxy at War or import an ME3 character.

Defeat a Harvester.

Set 100 enemies on fire with powers.

Score 13 headshots in a single operation.

Survive the swarm.

Eliminate 2 enemies with a single bullet.

Eliminate 13 enemies without taking damage.

Kill 10 guardians with headshots from the front while their shields are raised.

Complete a Direct Action operation.