Here is the full list of all 20 Knytt Underground trophies - there are 19 bronze and 1 silver.
Complete Chapter 3 without paying a single bell guard.
Find the secret ending.
Explore a beautiful forest.
Complete a hidden challenge in the Interlude.
Find a hidden disco area in the Interlude.
Find a hidden disco area in the hidden Juni story.
Find the hidden Juni story.
Find the sheep.
Find the hidden sandwich recipe.
Find the purple bird.
Find out where Susanna lives.
Get to a hard-to-reach spot above a museum.
Get to a hard-to-reach spot beneath the underwater lab.
Find a hidden disco area in one of the mini-chapters.
Get to a hard-to-reach spot above a purple forest.
Get to a hard-to-reach spot in Markstone Ridgemine.
Get to a hard-to-reach spot in a wintery place outside Crystal Path.
Get to a hard-to-reach spot near the area where you met Malie.
Complete the Mini Figure.
Complete the Figure.