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