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