Here is the full list of all 18 Endings achievements.
meet the eyes characters for the first time, watching on behalf of death
slave of death & sara's savoir, free the brid for the clutches of death
die for the first time.
Enjoying the ride? , maybe call a cab next time.
find Sara's tomb & figure out her birth date
find Sara's room
died 100 times .
enjoy moving the ring of death for the first time
Death is an eternal sleep, escape the angle of death before he collect your soul
sild over a cliff for the first time
use ropes for the first time
the all seeing one, the slave of death
the maze
pass your old neighborhood
finish the lost level, and find the three boxes