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.
Return from the Mirror of Spirits
Complete all Relics
Break all Vases
Unearth the Shard of Life
Stack three Pillars
Slay the same creature four times in a row
Find a Relic Fragment
Complete a Relic
Discover the Atlas of Beyond
Slay the Queen of Venom
Throw a spear six nodes or farther
Find the Key of Spirits
Get crushed by a Boulder
Stack two Pillars
Find the Key of Stones
Kill a creature by making it fall to its death
Find the Key of Snakes