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
Three thousand questions asked!
Eight hours played
Two thousand questions asked!
Solved in three
It's a bit hinty in here.
Solved in four
Solved in five
Excellent hint usage.
Solved in six
Five hundred insanity points reached
Three hundred insanity points reached
Zero hints, and you absolutely didn't cheat at all.
Solved in one
Two hundred insanity points reached
You made Nathan sing a song.
One thousand responses revealed!
One thousand questions asked!
Solved in two
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!