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.
Collect 15 Daedric Artifacts
Returned the Thieves Guild to its former glory
Bounty of 1000 gold in all nine holds
Escape from jail
Complete "Dragonslayer"
Complete "The Fallen"
Complete "Elder Knowledge"
Learn 20 shouts
Complete "Alduin's Wall"
Capture Solitude or Windhelm
Complete "Hail Sithis!"
Complete "Bound Until Death"
Complete "The Eye of Magnus"
Absorb 20 dragon souls
Capture Fort Sungard or Fort Greenwall
Complete "Diplomatic Immunity"
Complete "Revealing the Unseen"
Have 100,000 gold
Complete "The Way of the Voice"
Join the Dark Brotherhood
Successfully persuade, bribe, and intimidate
Complete 10 side quests
Learn all three words of a shout
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Complete "Darkness Returns"
Join the Thieves Guild
Buy a house
Find 13 Standing Stones
Get married
Complete "Glory of the Dead"
Reach Level 50
Become a member of the Circle
Read 50 Skill Books
Get a skill to 100
Clear 50 dungeons
Join the College of Winterhold
Make a smithed item, an enchanted item, and a potion
Pick 50 locks and 50 pockets
Reach Level 25
Discover 100 Locations
Complete 50 Misc Objectives
Acquire a Daedric Artifact
Join the Stormcloaks or the Imperial Army
Chop wood, mine ore, and cook food
Reach Level 10
Reach Level 5
Join the Companions
Select a Standing Stone blessing
Complete "Unbound"
Tame and ride 5 dragons
Learn the secrets of 5 Black Books
Craft an item out of Stalhrim
Own a house in Raven Rock
Learn all 3 words of Dragon Aspect
Complete "At the Summit of Apocrypha"
Discover 30 locations on the island of Solstheim
Complete "The Path of Knowledge"
Complete "The Temple of Miraak"
Arrive on Solstheim
Acquire 11 vampire perks
Acquire 11 werewolf perks
Defeat a Legendary Dragon
Learn all three words of Soul Tear
Change your face
Complete "Lost to the Ages"
Complete "Kindred Judgment"
Use the special power of Auriel's Bow
Complete "Beyond Death"
Complete "Awakening"
Build three houses
Buy three plots of land
Build three wings on a house
Buy a plot of land
Adopt a child