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