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