According to my Research
3.4%
Unlock the Scholar
Tower of Nod Achievements
20 achievements
Out of Thin Air
15.5%
Unlock the Visitor
Sleepwalker's Summit
12.0%
Scale the Tower for the first time
Passing the Reins
1.7%
Finish Champion's story
Compounding Interest
1.7%
Acquire 900 gold
Dynamo
6.8%
Destroy 10 enemies with a single thunderclap
Hook, Line, and Sinker
0.1%
Finish Researcher #638's story
Fetch Quest
3.4%
Finish Frido's story
Where the Heart is
0.1%
Finish Germh's story
Up, Up, and Away
6.8%
Jump 5 times without touching the ground or walls
Slick as a Whistle
10.3%
Clear a boss without taking any damage
Safe!
39.6%
Clear a climb without taking any damage
I Ain't 'Fraid of No Ghost
17.2%
Clear the Living Armor
Ranidaphobia
12.0%
Clear the Basilisk
Renovations Underway
22.4%
Damage blocks from underneath 20 times in a single level
Roll Me
3.4%
Reroll a climb reward 5 times.
Spring Cleaning
3.4%
Reduce your library to 4 pieces or fewer
Watch your Head
8.6%
Crush yourself with falling pieces 5 times in one room
Why'd it Have to be Snakes
12.0%
Clear the Gyrwurm
Old Fashioned
0.1%
Finish a run with a library identical to your starting library