HalluciGen, Inc.

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

Layout
When the Sole Survivor first encounters 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 due to the amount of collapsed floors. It would appear that the reception area after entering the main front door opens onto the second floor.

To access the third floor, the player character 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 the way into the first room on the third floor requiring their destruction.

The special grenade, HalluciGen gas grenade can only be made in Chemistry Station with a vat instead of normal "L" shaped Chemistry station. It is made with:
 * Adhesive #3
 * Aluminum #2
 * HalluciGen gas canister #1
 * Spring #1

At some point, one 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, a jump to the balcony with a staircase will lead upstairs where there's a room which will greet the player character with an announcement and invite them to test some products. Pressing the various 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

 * Tesla Science Magazine - Entrance level, northeast corner of the building, after ascending via a collapsed section of roofing. This is the room with the research terminal controlling a HalluciGen Suppressor prototype device.
 * Drugged water Five total in the entrance room. One on the small table immediately to the right after entering the building from the main entrance; four more behind the reception desk.
 * Fusion core - Second level, in the room where you first see the Gunner Conscript, between an upturned filing cabinet and desk on the floor.
 * HalluciGen gas canister - Several locations in the basement. Needed for a minor quest given by Fred Allen in Goodneighbor.
 * HalluciGen mission brief - On the Gunner Commander.
 * Help wanted! - On the entrance reception desk.
 * High Speed Shredding Minigun - In the basement room just west of the decontamination corridor and associated control room. Its in the same room as the Mainframe access terminal.
 * Note from Eric - On a desk beside a terminal.
 * Nuka Cola Quantum - In the same room as the Gunner Commander (southeast basement).
 * Stealth Boy - In an open safe in the same room as the Gunner Commander (southeast basement).
 * Mini nuke - on the floor in a room near the Tesla Science Magazine.
 * Technical document - Found in different cabinets and archives throughout the building

Appearances
HalluciGen Inc. only appears in Fallout 4.