Here is the full list of all 18 Lara Croft GO trophies - there are 3 bronze, 5 silver, 9 gold and 1 platinum.
Find the Key of Spirits
Get crushed by a Boulder
Stack two Pillars
Throw a spear six nodes or farther
Find the Key of Stones
Complete a Relic
Kill a creature by making it fall to its death
Find the Key of Snakes
Find a Relic Fragment
Collect all trophies
Discover the Atlas of Beyond
Break all Vases
Complete all Relics
Slay the Queen of Venom
Stack three Pillars
Unearth the Shard of Life
Slay the same creature four times in a row
Return from the Mirror of Spirits