Here is the full list of all 46 The Lord of the Rings: War in the North achievements worth 1,000 gamerscore.
Complete a playthrough on Legendary difficulty.
Equip all parts of an armor set.
Complete a playthrough on Heroic difficulty.
Unlock every active-cast ability in one character’s skill tree.
For one character unlock every skill that provides a modification to War Cry, Sanctuary or Evasion.
Create 15 potions in a single playthrough.
While in Hero Mode, perform a streak of 50 hits.
Absorb 25,000 total damage during the course of 1 level.
Kill 150 enemies with war machines in a single playthrough.
Kill 50 enemies with headshots in a single playthrough.
Defeat Agandaûr without the aid of Beleram.
Complete a playthrough on at least Normal difficulty.
Defeat Sauron's Lieutenant Agandaûr.
Complete the investigation of the Cult of the Lidless Eye.
Help weather the siege of Nordinbad.
Meet a dragon and survive.
Achieve level 20.
Kill 4 enemies simultaneously.
Complete 15 quests in a single playthrough.
Slay Saenathra.
Amass 25,000 coins.
Slay one enemy together with 2 other players.
Achieve at least 1 rank in a tier 3 skill.
Discover 25 secrets in a single playthrough.
Free the elf from his captors in Mirkwood Marsh.
Defeat the Sorceror Wulfrun.
Help destroy the citadel within Mount Gundabad.
Deal 3000 damage with a single ranged strike.
Slay the wild snow trolls.
Slay Bargrisar the stone giant.
Kill 600 enemies in a single playthrough.
Summon Beleram 10 times in a single playthrough.
Speak with Frodo in Rivendell.
Learn of the Ring of Power and the plan for its destruction.
Defeat the Barrow Wight Lord.
Discover what happened to the missing Rangers.
Achieve level 10.
Defeat Agandaûr's lieutenant Tharzog.
Slot an elfstone into an item.
Deal 1500 damage in a single melee strike.
Revive a fallen ally.
Kill 200 enemies in a single playthrough.
Locate 5 gilded treasure chests in a single playthrough.
Join forces with the sons of Elrond.
Help free the Great Eagle Beleram.
Perform 3 critical hits within 10 seconds.