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