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