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