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