Terror in the Night Quest Loca...
	Various Steam Achievements...

This is an easily missable sidequest location, so here's a quick overview on how to find the right area in Station 4.

Station 4 Map
On Station 4 there is a hidden passageway at (23, 27). After passing through a few more walls, there is a door to the east at (27, 35). You'll find your quest objective after going down the short hallway.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Discarded NPC	Unknown.
A Dream Half Remembered	Complete Chapter 1
A High Functioning Team	Team Kessens Used 50
A Traveler Approaches	Complete Prologue
Alchemist	Item Recipes Learned 50%
Awakening : Bold New World	Unknown.
Awakening : Chaos Reborn	Unknown.
Blade and Wand	Unknown.
Botanist	Gather Rank S
Boys Need Saving Too	Unknown.
Bragging Rights	Yokai Killed 25
Caller	Summons Used 25
Cling Together	Unknown.
Cobbler	Steps taken 1,000
Completionist	Complete 50% of Quests
Daughter of Chaos	Unknown.
Deathbringer	Unknown.
Drinks Are On Me	Dinari Earned 1,000,000
Eater of Dreams	Unknown.
Enchanter	Enchantments Known 50%
Extinction Event	Yokai Killed 50
Filia ex Machina	Unknown.
Gate to Another World	Complete Chapter 2
Grand Alchemist	Item Recipes Learned 100%
Grand Caller	Summons Used 50
Grand Completionist	Complete All Quests
Grand Enchanter	Enchantments Known 100%
Grand Portalmancy	Wild Portals Unlocked 100%
Grand Slayer	Enemies Killed 1000
Grand Summoner	Summons Acquired 100%
Grand Zoologist	Bestiary 100%
Grigori Ascendant	Unknown.
Guardian of Souls	Unknown.
Harvester of Souls	Unknown.
Heart Bound	Unknown.
Heart Breaker	Unknown.
I Swear I'm Not Lost	Steps Taken 10,000
Keeper of Secrets	Unknown.
Kinslayer	Unknown.
Linguist	Decipher Rank S
Lockmaster	Unlock Rank S
Lost Traveler Found	Unknown.
Master of Perception	Search Rank S
Moneybags	Dinari Earned 100,000
Mother of Demons	Unknown.
Old Friends, New Adventures	Complete Chapter 3
Oremonger	Mine Rank S
Pain and Shadow	Complete Chapter 4
Portalmancy	Wild Portals Unlocked 50%
Potestas Angelus	Unknown.
Puzzle Grandmaster	Puzzle Rooms Completed 100%
Puzzle Master	Puzzle Rooms Completed 50%
Serpent and the Wolf	Unknown.
Servant of Love	Unknown.
Side by Side	Unknown.
Skull-Popper	Unknown.
Slayer	Enemies Killed 500
Summoner	Summons Acquired 50%
Sword of Loyalty	Unknown.
Teamwork	Team Kessens Used 25
The 9 Headed Hydra	Unknown.
The Brightest Flame	Unknown.
The Demon General	Unknown.
The Dragon Prince	Unknown.
The Dreadwing	Unknown.
The Final Seal	Unknown.
The Mad Scientist	Unknown.
The Pentagrammaton	Unknown.
The Serpent's Tongue	Unknown.
The Voice of Chaos	Unknown.
The Will of the Ancients	Complete Chapter 5
Trophy Room	Hunt Rank S
Vengeance for Gar	Unknown.
Zoologist	Bestiary 50%