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