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