The "where did they go?" Achievement.
I am not sure how many people, but few have unlocked this secret achievement.
To prepare before hand, you MUST have a key... (Skeleton or Dull, Not broken)
if you'd like, have a SWF party.
Step 1) Do dem Gens Real Quick, finish all 5 gens without anyone and I mean ANYONE.. dying or Dc'ing. If this happens then the achievement is a loss.
Step 2) Don't Die! if you die (as I stated previously) the achievement is a loss
Step 3 )Once the other 2 steps are finished, Gather all Survivors by the hatch. make sure that the killer is far enough away. for all Four survivors to escape through the hatch.
Note: make sure that all four of the survivors are there and DO NOT Leave the end game screen or you will NOT get the achievement. All survivors must escape at the SAME TIME.