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