Here is the full list of all 35 The Infectious Madness of Doctor Dekker achievements.
It's a bit hinty in here.
Solved in one
Three hundred insanity points reached
You made Nathan sing a song.
One thousand responses revealed!
Two hundred insanity points reached
One hundred and fifty insanity points reached
Twenty hours played
Seven hundred and fifty responses revealed!
Two thousand questions asked!
One hundred insanity points reached
Sixteen hours played
Five hundred responses revealed!
One thousand questions asked!
Eight hours played
Two hundred and fifty responses revealed!
Fifty insanity points reached
Four hours played
Five hundred questions asked!
One hundred responses revealed!
Two hours played
Two hundred and fifty questions asked!
One hundred questions asked!
Ten responses revealed!
Twenty questions - well done!
Three thousand questions asked!
Twenty five hours played
Solved in two
Solved in three
Solved in four
Solved in five
Solved in six
Five hundred insanity points reached
Zero hints, and you absolutely didn't cheat at all.
Excellent hint usage.