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.
Reach Level 50
Learn 20 shouts
Complete "The Eye of Magnus"
Complete "Revealing the Unseen"
Complete "Hail Sithis!"
Complete "Bound Until Death"
Collect 15 Daedric Artifacts
Bounty of 1000 gold in all nine holds
Read 50 Skill Books
Returned the Thieves Guild to its former glory
Pick 50 locks and 50 pockets
Complete "Darkness Returns"
Clear 50 dungeons
Get a skill to 100
Complete "Dragonslayer"
Absorb 20 dragon souls
Complete "The Fallen"
Complete "Elder Knowledge"
Complete "Alduin's Wall"
Capture Solitude or Windhelm
Capture Fort Sungard or Fort Greenwall
Join the Stormcloaks or the Imperial Army
Have 100,000 gold
Complete 10 side quests
Complete "Diplomatic Immunity"
Get married
Complete "Glory of the Dead"
Reach Level 25
Join the Dark Brotherhood
Discover 100 Locations
Find 13 Standing Stones
Join the Thieves Guild
Complete 50 Misc Objectives
Successfully persuade, bribe, and intimidate
Acquire a Daedric Artifact
Join the College of Winterhold
Learn all three words of a shout
Become a member of the Circle
Buy a house
Reach Level 10
Chop wood, mine ore, and cook food
Escape from jail
Join the Companions
Complete "The Way of the Voice"
Make a smithed item, an enchanted item, and a potion
Reach Level 5
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Select a Standing Stone blessing
Complete "Unbound"
Learn the secrets of 5 Black Books
Tame and ride 5 dragons
Own a house in Raven Rock
Craft an item out of Stalhrim
Learn all 3 words of Dragon Aspect
Complete "At the Summit of Apocrypha"
Complete "The Path of Knowledge"
Complete "The Temple of Miraak"
Discover 30 locations on the island of Solstheim
Arrive on Solstheim
Defeat a Legendary Dragon
Acquire 11 vampire perks
Complete "Lost to the Ages"
Complete "Kindred Judgment"
Learn all three words of Soul Tear
Use the special power of Auriel's Bow
Complete "Beyond Death"
Complete "Awakening"
Acquire 11 werewolf perks
Change your face
Build three houses
Buy three plots of land
Build three wings on a house
Buy a plot of land
Adopt a child