Full list of all 75 The Elder Scrolls V: Skyrim achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 3 DLC packs containing 25 achievements.
Collect 15 Daedric Artifacts
Complete "The Eye of Magnus"
Get married
Complete "Dragonslayer"
Complete "The Fallen"
Complete "Elder Knowledge"
Complete "Alduin's Wall"
Complete "Diplomatic Immunity"
Capture Solitude or Windhelm
Capture Fort Sungard or Fort Greenwall
Learn 20 shouts
Returned the Thieves Guild to its former glory
Complete "Darkness Returns"
Complete "Hail Sithis!"
Complete "Bound Until Death"
Escape from jail
Bounty of 1000 gold in all nine holds
Join the Dark Brotherhood
Reach Level 50
Have 100,000 gold
Find 13 Standing Stones
Chop wood, mine ore, and cook food
Make a smithed item, an enchanted item, and a potion
Complete 10 side quests
Absorb 20 dragon souls
Learn all three words of a shout
Complete "Glory of the Dead"
Read 50 Skill Books
Clear 50 dungeons
Discover 100 Locations
Join the Stormcloaks or the Imperial Army
Get a skill to 100
Complete "Revealing the Unseen"
Buy a house
Pick 50 locks and 50 pockets
Reach Level 25
Successfully persuade, bribe, and intimidate
Acquire a Daedric Artifact
Complete 50 Misc Objectives
Join the Thieves Guild
Join the College of Winterhold
Complete "The Way of the Voice"
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Become a member of the Circle
Reach Level 10
Join the Companions
Reach Level 5
Select a Standing Stone blessing
Complete "Unbound"
Learn the secrets of 5 Black Books
Tame and ride 5 dragons
Own a house in Raven Rock
Complete "At the Summit of Apocrypha"
Learn all 3 words of Dragon Aspect
Craft an item out of Stalhrim
Complete "The Path of Knowledge"
Complete "The Temple of Miraak"
Discover 30 locations on the island of Solstheim
Arrive on Solstheim
Defeat a Legendary Dragon
Complete "Lost to the Ages"
Acquire 11 vampire perks
Use the special power of Auriel's Bow
Learn all three words of Soul Tear
Complete "Kindred Judgment"
Complete "Beyond Death"
Acquire 11 werewolf perks
Complete "Awakening"
Change your face
Build three houses
Buy three plots of land
Build three wings on a house
Adopt a child
Buy a plot of land