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