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