Destroyed three flying transports on Aridia

Shoot a Scream through the sniper hole on Orxon

Stand between Al's Roboshack Statue's legs on Kerwan

Kill all Anklebiters on Planet Hoven

Obtain the Premium Nanotech upgrade

Beat the hoverboard challenge in less than 1:35 on Rilgar

Obtain the Suck Cannon

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

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

Reach level 20 in multiplayer or level 60 in single-player.

Kill 100 enemies with melee attacks.

Hijack an Atlas mech.

Finish all multiplayer maps on Gold or all single-player missions on Insanity.