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