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