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