Here is the full list of all 47 Silence trophies - there are 30 bronze, 14 silver, 2 gold and 1 platinum.
Obtain all the trophies
Skip every puzzle
Finish the game without skipping a text
Finish the game without using the snoopkey
Shoot the gate
Kick everything possible.
Balance without falling down.
Place candles everywhere possible
Listen to Kyra
Sneeze over the candle
Get to the gate in 8 steps
Spot licked everything
Completed the prayer mill story with the life wheel
Completed the prayer mill story with the dream wheel
Find all possible Spot interactions
Let Spot fly
Let Renie and Noah both pop the bubble
Let Sadwick die every time it´s possible
Find all bugs
Hit Kyra
Spot plunges everywhere
Burn the swamp
Let the fish get the berries 3 times
Taste the everything in the swamp
Lick the mushrooms until you pass out
Drop the Noiseball
Don´t prime the bomb
Let the mushroom fart ten times
Pull the world worm's tooth
Trigger the same game over sequence twice in a row
Play with the shadows.
Go through the mirror
Finish the game without dying
Stay in Silence
You finished chapter three
Dive through the clouds
Send Spot to Kyra
Use the magic boxes to change into all available Spot forms
Grab 10 gold from the well
Discover every possible Spot form
Fail three times in balance checks.
You finished chapter two
Completed the prayer mill story with the death wheel
Look into the abyss
You finished chapter one
Prime the bomb
Fix the bomb without letting go