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