Complete the ECHOES level undetected by the Watchmen.

Escape the chasing Nazis on the REICH level without being caught once.

Choose three primary weapons that use different ammo.

Complete the game in Spartan Mode.

Kill 10 Spiders.

Kill 100 nosalises.

Use a Medkit 75 times.

Kill 50 Watchmen.

Kill 15 human enemies with Headshots from at least 30 meters' distance.

Kill 100 enemies with shotguns.

Kill 30 human enemies with headshots.

Rescue Keith from Buck.

Reach Sergeant (Level 10) in multiplayer Public Match.