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