Here is the full list of all 16 SKYHILL: Black Mist achievements.
Received a phone call...
So it begins...
Craft at least 1 instance of each item
Kill huge monster
Open at least 100 containers
Die from the corruption monster
Kill 6 fat monsters.
Find the exit from the maze.
Exit the second endless loop.
Exit the third endless loop.
Exit the fourth endless loop.
Jump
Find the experimental gun.
Find at least one nest.
See what happens after the timer is over.
Die from a fireman's axe.