Here is the full list of all 35 The Infectious Madness of Doctor Dekker achievements.
Solved in one
You made Nathan sing a song.
Three hundred insanity points reached
One thousand responses revealed!
Two hundred insanity points reached
Two thousand questions asked!
One hundred and fifty insanity points reached
Seven hundred and fifty responses revealed!
Eight hours played
One hundred insanity points reached
Five hundred responses revealed!
One thousand questions asked!
Four hours played
Two hundred and fifty responses revealed!
Fifty insanity points reached
Five hundred questions asked!
Two hours played
One hundred responses revealed!
Two hundred and fifty questions asked!
One hundred questions asked!
Ten responses revealed!
Twenty questions - well done!
Three thousand questions asked!
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.
It's a bit hinty in here.