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