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