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