Here is the full list of all 20 GNOG trophies - there are 20 bronze.
Complete HOM-3
Complete FRG-Y
Complete EATER
Complete CANDY
Complete LAB-O
Complete LOG
Complete VORT-X
Complete SUB-01
Complete PURP-L
Finish the game
Unlock every level
Leave no trace
Please don't bother the amphibians
Keep the kitchen clean
Watch what you eat
Daydream at the blackboard
Leave no worm behind
Test the astronaut for space sickness
Discover what lurks below
Experiment in the studio