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