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