Here is the full list of all 33 Solar Ash trophies - there are 14 bronze, 13 silver, 5 gold and 1 platinum.
Attain all Trophies
Find all of Tarragon Danderpaws' lost journals
Complete the game on Hardcore Mode
Complete the game in under 3 hours
Remain airborne for 10 seconds
Kill 5 enemies in under 5 seconds
Activate the Starseed
Destroy the Starseed and free Echo
Attain 100% completion on a save file
Destroy the Remnant in the Luminous Peak
Fully power the Starseed
Collect all Voidrunner Stashes
Complete Ahrric's Quest
Complete all NPC quests
Locate Cyd in The Luminous Peak
Destroy the Remnant in the Mirrorsea
Complete Ames' Quest
Locate Cyd in the Mirrorsea
Destroy the Remnant in the Eternal Garden
Locate Cyd in the Eternal Garden
Destroy the Remnant in Ironroot Basin
Complete Lyris' Quest
Find 5 of Tarragon Danderpaw's lost journals
Collect 10000 Plasma
Locate Cyd in Ironroot Basin
Destroy the Remnant in the Broken Capital
Kill 3 enemies without touching the ground
Collect 5000 Plasma
Locate Cyd in the Broken Capital
Destroy the Remnant in the Crater
Collect 1000 Plasma
Collect 1 Voidrunner Stash
Activate Cyd