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