Here is the full list of all 15 PixelJunk SideScroller trophies - there are 13 bronze, 1 silver and 1 gold.
Get all three hidden Crowns in any Sector.
Receive the highest ranking Medal on any Sector.
Complete any Sector on the Brutal difficulty setting.
Complete any Sector on the Hard difficulty setting.
Defeat the final Boss.
Complete all three Stages.
Defeat 10 enemies or more using one Laser shot.
Complete any Sector by playing with a friend in co-op mode.
Complete any Sector without getting hit by a single shot.
Complete any Sector without firing a single shot. (Hint: Use the Charge Attack!)
Defeat 50 enemies using the Charge Attack.
Complete all Sectors in one Stage.
Complete your first Sector.
String together a Combo of 100 points or more.
Use each weapon one time.