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