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