Complete Operation A

Complete Operation B

Earn a star of any type

Earn your first Gold star

Earn all Gold stars

Earn 25000 XP throughout your career

Earn all medals in the game at least once

Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)

Use every armor ability at least once (excluding Overshield and Seeker Drone)

Complete any mission with the maximum number of Skulls active

Complete Operation E, Mission 1 with the Hollow and Black Eye Skulls active

Complete all campaign mission specific Assault Ops in campaign A to E

Complete Operation C

Complete Operation F

Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2

Earn all Gold stars in Operation F

Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active

Complete all Operation F mission challenges

Complete Operation D

Complete Operation E

Keep all Wolverines intact in Operation A, Mission 3

Prevent all Jackals from regenerating their shields in Operation B, Mission 3

Kill a convoy target with every stationary gun in Operation C, Mission 3

Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1

Finish the objective without using any vehicles/turrets in Operation E, Mission 4