HalluciGen, Inc.

HalluciGen Inc. is a location in the Commonwealth in Fallout 4.

Layout
When you first encounter the facility, there has been a chemical leak and all the NPCs are attacking one another. Towards the end there is a decontamination chamber that cures radiation poisoning.

The layout of the building can lead to some confusion in determining which level you are on due to the significant amount of collapsed floors in the building. It would appear that the reception area after entering the main front door opens onto the second floor.

To access the third floor you may need to walk into a wall painting blocking the doorway to the staircase leading to it to nudge it out of the way. Further, two inactive protectrons may block your way into the first room on the third floor requiring their destruction.

In the Lab there are 3 chemistry stations that allow creating of the exclusive to this location HalluciGen gas grenade. It is made with:
 * Adhesive #3
 * Aluminum #2
 * HalluciGen gas canister #1
 * Spring #1

At some point you can ascend into a corridor with several doors, which are opened by buttons. There are gunners fighting behind each of them. Instead of opening the doors and simply killing them, you may jump to the balcony with a staircase. Upstairs there's a room which will greet you with an announcement and invite you to test some products. Pressing the buttons in this room will emit poisonous gases to the rooms downstairs, where the gunners are. A terminal in this room reveals that the rooms below were actually used to demonstrate the products to VIPs, after which the rooms should be 'cleared of test subjects, blood, fluids'.

Notable loot

 * Nuka Cola Quantum - Found in the same room as the gunner commander just before the rear door that is locked by a key found on the commander.
 * Minigun - one floor down from entrance level, found after traversing through most of the building from the front door. In the room just before and to the right of the decontamination corridor and associated control room.
 * Fusion core - located on the second level in the room where you first see the Gunner Conscript. Found between an upturned filing cabinet and desk on the floor.
 * Tesla Science Magazine - found on the second floor after ascending via a collapsed section of roofing. It is found in the first room after the hallway on a cabinet in the northwest corner (there is a Research terminal in this room).
 * Stealth Boy - Found in an open safe in the laboratory located just after the decontamination room.
 * HalluciGen gas canister - multiple found within the lower layers of the facility (needed for a minor quest given by a drug dealer in Goodneighbour.
 * HalluciGen mission brief - found on the Gunners commander.
 * Note from Eric - on a desk beside a terminal.
 * Help Wanted - found on entrance reception desk.

Appearances
HalluciGen Inc. only appears in Fallout 4.