Here is the full list of all 22 The Infectious Madness of Doctor Dekker trophies - there are 7 bronze, 6 silver, 8 gold and 1 platinum.
Acquire all trophies.
Zero hints, and you absolutely didn't cheat at all.
Solved the case using less than a hundred hints.
Solved Doctor Dekker's murder.
Solved Doctor Dekker's murder without accusing any innocent people.
Four hundred insanity points reached.
Eight hours played.
You made Nathan sing a song.
One thousand questions asked!
Three hundred insanity points reached.
Two 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!