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