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
Get married
Returned the Thieves Guild to its former glory
Have 100,000 gold
Bounty of 1000 gold in all nine holds
Complete "The Way of the Voice"
Complete "Hail Sithis!"
Learn 20 shouts
Complete "Dragonslayer"
Complete "The Fallen"
Complete "Bound Until Death"
Find 13 Standing Stones
Capture Solitude or Windhelm
Read 50 Skill Books
Get a skill to 100
Complete "Darkness Returns"
Complete "The Eye of Magnus"
Capture Fort Sungard or Fort Greenwall
Reach Level 50
Complete "Revealing the Unseen"
Complete "Elder Knowledge"
Absorb 20 dragon souls
Join the Dark Brotherhood
Complete "Glory of the Dead"
Complete "Alduin's Wall"
Clear 50 dungeons
Complete "Diplomatic Immunity"
Join the Thieves Guild
Pick 50 locks and 50 pockets
Complete 10 side quests
Join the College of Winterhold
Discover 100 Locations
Learn all three words of a shout
Become a member of the Circle
Reach Level 25
Buy a house
Successfully persuade, bribe, and intimidate
Complete 50 Misc Objectives
Chop wood, mine ore, and cook food
Join the Stormcloaks or the Imperial Army
Make a smithed item, an enchanted item, and a potion
Select a Standing Stone blessing
Acquire a Daedric Artifact
Reach Level 10
Escape from jail
Join the Companions
Reach Level 5
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Complete "Unbound"
Tame and ride 5 dragons
Craft an item out of Stalhrim
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"
Discover 30 locations on the island of Solstheim
Complete "The Temple of Miraak"
Arrive on Solstheim
Defeat a Legendary Dragon
Acquire 11 werewolf perks
Use the special power of Auriel's Bow
Acquire 11 vampire perks
Learn all three words of Soul Tear
Complete "Kindred Judgment"
Complete "Beyond Death"
Complete "Awakening"
Complete "Lost to the Ages"
Change your face
Build three houses
Buy three plots of land
Adopt a child
Build three wings on a house
Buy a plot of land