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