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