No missable achievements (plus 75 unknown)
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Complete "Unbound"
Select a Standing Stone blessing
Reach Level 5
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Reach Level 10
Complete "The Way of the Voice"
Learn all three words of a shout
Join the College of Winterhold
Acquire a Daedric Artifact
Buy a house
Join the Companions
Reach Level 25
Make a smithed item, an enchanted item, and a potion
Arrive on Solstheim
Join the Thieves Guild
Complete "Diplomatic Immunity"
Discover 100 Locations
Successfully persuade, bribe, and intimidate
Complete 50 Misc Objectives
Complete "Awakening"
Complete "Alduin's Wall"
Get a skill to 100
Become a member of the Circle
Join the Stormcloaks or the Imperial Army
Buy a plot of land
Join the Dark Brotherhood
Complete "The Temple of Miraak"
Complete "Elder Knowledge"
Adopt a child
Complete "Revealing the Unseen"
Complete "The Eye of Magnus"
Absorb 20 dragon souls
Complete "Beyond Death"
Clear 50 dungeons
Complete 10 side quests
Complete "The Fallen"
Complete "Glory of the Dead"
Complete "The Path of Knowledge"
Complete "Bound Until Death"
Complete "Dragonslayer"
Build three wings on a house
Chop wood, mine ore, and cook food
Complete "Kindred Judgment"
Capture Fort Sungard or Fort Greenwall
Complete "Hail Sithis!"
Capture Solitude or Windhelm
Complete "At the Summit of Apocrypha"
Complete "Darkness Returns"
Get married
Have 100,000 gold
Learn 20 shouts
Change your face
Reach Level 50
Find 13 Standing Stones
Read 50 Skill Books
Learn all 3 words of Dragon Aspect
Escape from jail
Learn all three words of Soul Tear
Own a house in Raven Rock
Discover 30 locations on the island of Solstheim
Complete "Lost to the Ages"
Pick 50 locks and 50 pockets
Learn the secrets of 5 Black Books
Use the special power of Auriel's Bow
Returned the Thieves Guild to its former glory
Buy three plots of land
Craft an item out of Stalhrim
Acquire 11 werewolf perks
Defeat a Legendary Dragon
Build three houses
Collect 15 Daedric Artifacts
Tame and ride 5 dragons
Acquire 11 vampire perks
Bounty of 1000 gold in all nine holds