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