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