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