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