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