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
You made Nathan sing a song.
One thousand responses revealed!
One hundred and fifty insanity points reached
Three thousand questions asked!
One hundred insanity points reached
Seven hundred and fifty responses revealed!
Eight hours played
Two thousand questions asked!
Five hundred responses revealed!
Four hours played
One thousand questions asked!
Fifty insanity points reached
Two hundred and fifty responses revealed!
Two hours played
Five hundred questions asked!
One hundred responses revealed!
Two hundred and fifty questions asked!
One hundred questions asked!
Twenty questions - well done!
Ten responses revealed!
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
Two hundred insanity points reached
Three hundred insanity points reached
Five hundred insanity points reached
Zero hints, and you absolutely didn't cheat at all.
Excellent hint usage.