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