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