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