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