Here is the full list of all 33 Warhammer 40,000: Space Wolf achievements worth 1,000 gamerscore.
Earn all achievements.
Complete 'Brothers at Arms' mission.
Find all surviving brothers.
Complete the first campaign.
Complete the second campaign.
Complete the third campaign.
Destroy 30 barrels.
Destroy 50 enemies with a Plasma Cannon.
Destroy 50 enemies with a Thunder Hammer.
Destroy 50 enemies with a Sniper Rifle.
Forge 10 legendary cards.
Destroy 50 Chaos Cultists.
Destroy 50 Chaos Marines.
Destroy 50 Bloodletters of Khorne.
Aquire all upgrades for the Power Armour.
Aquire all upgrades for the Terminator Armour.
Aquire all upgrades for the Scout Armour.
Complete 'Cold Welcome' mission.
Complete the fourth campaign.
Defeat Necron Cryptek in the 'Gate to Eternity' mission.
Defeat the Keeper of Secrets.
Defeat the Keeper of Secrets without destroying the obelisks.
Defeat the Necron Lord.
Aquire data from all 9 cogitators in the 'Straight Through' mission.
Complete 'Stairs of Nightmare' mission whithout any squadmates.
Destroy all anemies in 'Cold Welcome' mission.
Defeat 10 Necron Lychguards.
Defeat 5 Necron Destroyer
Destroy 50 enemies with a Grav-gun.
Destroy 50 enemies with a Power Maul.
Destroy 50 Necron Warriors.
Destroy 50 Necron Deathmarks.
Destroy 50 Canoptek Scarabs