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