Here is the full list of all 48 LEGO The Lord of the Rings achievements worth 1,000 gamerscore.
Complete 'The Mines of Moria' in under 15 minutes.
Collect more than 10,000,000,000 studs. (Single Player Only)
Get 100%. (Single Player Only)
Craft every Mithril item. (Single Player Only)
Collect all the Mithril Bricks. (Single Player Only)
Unlock all characters. (Single Player Only)
Collect all the Red Bricks. (Single Player Only)
Complete all the Fetch Quests in Middle-earth. (Single Player Only)
Use the Ent Draught on Pippin.
Dress a character completely in treasure items.
Travel to Isengard as every playable Hobbit.
Unlock all the Map Stones in Middle-earth. (Single Player Only)
Turn an enemy into a skeleton and make them dance.
Equip Aragorn with the Mushroom Crown.
Craft the Fire and Ice Bows. (Single Player Only)
Throw Gimli 30 times.
Defeat 42 Uruk-hai as Legolas.
Achieve True Adventurer in every level. (Single Player Only)
Travel to Trollshaws as Bilbo.
Defeat Gollum as Gollum.
Walk into Mordor.
Complete 2 cooking puzzles.
Complete the Bonus Level.
Complete 'Mount Doom'.
Complete 'The Black Gate'.
Complete 'The Battle of Pelennor Fields'.
Defeat an Oliphaunt as Legolas.
Complete 'The Paths of the Dead'.
Complete 'Cirith Ungol'.
Complete 'The Secret Stairs'.
Complete 'Osgiliath'.
Complete 'The Dead Marshes'.
Complete 'Helm's Deep'.
Finish one of Gimli's opponents as Legolas in 'Helm's Deep'.
Complete 'Warg Attack'.
Complete 'Track Hobbits'.
Complete 'Taming Gollum'.
Complete a level in co-op.
Fish perfectly 20 times by pressing the icon as it flashes.
During 'Prologue', jump into the fires of Mount Doom as Isildur.
Complete 'Amon Hen'.
Reach the top of Amon Hen without being caught once by Boromir. (Single Player Only)
Complete 'The Mines of Moria'.
Complete 'The Pass of Caradhras'.
Form The Fellowship of the Ring.
Complete 'Weathertop'.
Complete 'The Black Rider'.
Complete 'Prologue'.