Here is the full list of all 12 A Chair in a Room: Greenwater trophies - there are 8 bronze, 3 silver and 1 gold.
Cognitive response detected
Get the preacher to confess
Complete the dark room
There was never a trial
Uncovered the body
Initiated the first memory
Completed a day in the hospital
Feed the crocodile
He walked on water
Consumed 66 tablets in the Pelican Motel
Give the preacher something he doesn't want.
Complete the epilogue