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