Here is the full list of all 17 Lara Croft GO achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Stack three Pillars
Throw a spear six nodes or farther
Return from the Mirror of Spirits
Complete all Relics
Break all Vases
Unearth the Shard of Life
Slay the same creature four times in a row
Discover the Atlas of Beyond
Slay the Queen of Venom
Get crushed by a Boulder
Find the Key of Spirits
Stack two Pillars
Find the Key of Stones
Kill a creature by making it fall to its death
Find the Key of Snakes
Complete a Relic
Find a Relic Fragment