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 thousand questions asked!
One hundred and fifty insanity points reached
Four hours played
One hundred insanity points reached
Seven hundred and fifty responses revealed!
Five hundred responses revealed!
Five hundred questions asked!
Two hours played
Fifty insanity points reached
Two hundred and fifty responses revealed!
Two hundred and fifty questions asked!
One hundred responses revealed!
One hundred questions asked!
Twenty questions - well done!
Ten responses revealed!
Two thousand questions asked!
Three thousand questions asked!
Eight hours played
Sixteen hours played
Twenty hours played
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.