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 "Glory of the Dead"
Learn 20 shouts
Get married
Reach Level 50
Complete "Dragonslayer"
Complete "The Fallen"
Clear 50 dungeons
Find 13 Standing Stones
Complete "The Eye of Magnus"
Get a skill to 100
Complete "Revealing the Unseen"
Read 50 Skill Books
Complete "Elder Knowledge"
Successfully persuade, bribe, and intimidate
Complete 10 side quests
Absorb 20 dragon souls
Complete "Alduin's Wall"
Become a member of the Circle
Discover 100 Locations
Acquire a Daedric Artifact
Complete 50 Misc Objectives
Reach Level 25
Join the Stormcloaks or the Imperial Army
Complete "Diplomatic Immunity"
Join the College of Winterhold
Learn all three words of a shout
Buy a house
Reach Level 10
Chop wood, mine ore, and cook food
Make a smithed item, an enchanted item, and a potion
Complete "The Way of the Voice"
Reach Level 5
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Join the Companions
Select a Standing Stone blessing
Complete "Unbound"
Join the Thieves Guild
Complete "Darkness Returns"
Returned the Thieves Guild to its former glory
Join the Dark Brotherhood
Complete "Bound Until Death"
Complete "Hail Sithis!"
Pick 50 locks and 50 pockets
Escape from jail
Bounty of 1000 gold in all nine holds
Have 100,000 gold
Collect 15 Daedric Artifacts
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
Acquire 11 werewolf perks
Complete "Awakening"
Change your face
Complete "Beyond Death"
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 vampire perks
Defeat a Legendary Dragon
Buy three plots of land
Build three wings on a house
Adopt a child
Buy a plot of land
Build three houses