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