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