Full list of all 75 The Elder Scrolls V: Skyrim achievements worth 1,550 gamerscore.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 25 achievements worth 550 Gamerscore.
Complete "Bleak Falls Barrow"
Complete "The Way of the Voice"
Complete "Diplomatic Immunity"
Complete "Alduin's Wall"
Complete "Elder Knowledge"
Complete "The Fallen"
Join the Companions
Become a member of the Circle
Complete "Darkness Returns"
Complete "Hail Sithis!"
Join the Stormcloaks or the Imperial Army
Successfully persuade, bribe, and intimidate
Buy a house
Discover 100 Locations
Absorb a dragon soul
Learn all three words of a shout
Returned the Thieves Guild to its former glory
Capture Solitude or Windhelm
Complete 50 Misc Objectives
Find 13 Standing Stones
Escape from jail
Bounty of 1000 gold in all nine holds
Have 100,000 gold
Get a skill to 100
Collect 15 Daedric Artifacts
Absorb 20 dragon souls
Learn 20 shouts
Clear 50 dungeons
Read 50 Skill Books
Reach Level 50
Pick 50 locks and 50 pockets
Complete "The Eye of Magnus"
Complete "Revealing the Unseen"
Complete 10 side quests
Get married
Chop wood, mine ore, and cook food
Complete "Dragonslayer"
Complete "Bound Until Death"
Join the Dark Brotherhood
Capture Fort Sungard or Fort Greenwall
Reach Level 25
Complete "Glory of the Dead"
Join the Thieves Guild
Acquire a Daedric Artifact
Reach Level 10
Make a smithed item, an enchanted item, and a potion
Reach Level 5
Join the College of Winterhold
Select a Standing Stone blessing
Complete "Unbound"
Acquire 11 werewolf perks
Complete "Lost to the Ages"
Acquire 11 vampire perks
Complete "Awakening"
Change your face
Learn all three words of Soul Tear
Use the special power of Auriel's Bow
Complete "Kindred Judgment"
Complete "Beyond Death"
Defeat a Legendary Dragon
Build three houses
Buy three plots of land
Build three wings on a house
Buy a plot of land
Adopt a child
Complete "The Temple of Miraak"
Tame and ride 5 dragons
Learn the secrets of 5 Black Books
Own a house in Raven Rock
Discover 30 locations on the island of Solstheim
Craft an item out of Stalhrim
Learn all 3 words of Dragon Aspect
Complete "At the Summit of Apocrypha"
Complete "The Path of Knowledge"
Arrive on Solstheim