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