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