Discover and scan 50% of the holograms.

Finish the 'Descent' mission.

Kill 50 enemies with the Shotgun.

Finish the 'Arrival' mission.

Multi-kill -- 5 enemies with 1 Frag grenade.

Achieve a team score of higher than 270,000 in the Chaos Invasion mission.

Kill 500 enemies using Melee weapons.

Kill 2500 enemies.

Fill every slot on Tony's trophy shelf.

Achieve a 5-Star rating on a mission.

Kill eight enemies in eight seconds using the Darkstar Fission Tether with two or more teammates.

Kill 100 enemies with Mr. Zurkon out.

Complete all Missions.