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