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