Here is the full list of all 19 Titan Chaser trophies - there are 3 bronze, 7 silver, 8 gold and 1 platinum.
Unlock all trophies
Turn off the water and switch off all the lights in your room
Ask Jasper for help via the radio for the first time.
Find Lucy's memorial around Silent Peak
Visit your parents in Woodville
Call Jasper from a phone booth for the first time.
Call Jasper from all phones on a map
Destroy 50 road markers
Turn on the music in your car
Escort a wyvern to her home
Scare a wyvern with your car horn
Shine your spotlight on the wyvern
Deal with wandering titans
Escort the last whale
Find where is Jasper during a third night
Embrace the Kraken.
No matter what you choose, this is your new life
Climb all 9 Satellite towers in one night
Collect all pumpkins and learn the story of Woodville Witch on Halloween Special