Here is the full list of all 30 Skully trophies - there are 11 bronze, 13 silver, 5 gold and 1 platinum.
Obtain all other Trophies
Sacrifice yourself to save the world
Defeat Terry & Break the Jar
Find 100% of the collectibles in all chapters
Throw Skully 60m
Find the super secret Terry Figure
Find 100% of the collectibles in 15 chapters
Say Hi to Mom
Complete 10 different chapters without dying
Have a falling-out with Terry
Find 100% of the collectibles in 12 chapters
Find the super secret Brent Figure
Complete the Volcano Eruption without dying
Complete the Lava Tube Chase without dying
Defeat 50 Lava Punks
Stare straight at the Camera
Find the super secret Fiona Figure
Complete 5 different chapters without dying
Find 100% of the collectibles in 8 chapters
Complete the Tidal Wave Chase without dying
Find the super secret Wanda Figure
Capture Wanda
Defeat 100 Water Punks
Complete any chapter without dying
Find 100% of the collectibles in any chapter
Summon the Swift Form
Find 100% of the collectibles in 4 chapters
Summon the Strong Form
Meet Terry
Summon the Vault Form