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