Project Zomboid Secret Military Research Facility Guide (Build 42): Location, Content, Survival Tips, & more

Also called the secret military base, this hidden research facility in Project Zomboid lies deep within the forests of Rosewood. Shrouded in mystery, this location is arguably the toughest place in Knox Country to clear. It’s a sprawling underground complex with undead hordes filling it to the brim. So, keep reading to learn what lies ahead for you and your Project Zomboid server buddies when you venture into this treacherous establishment.

What is the Secret Military Research Facility in Project Zomboid?

The secret military research facility is a remote compound in Project Zomboid that’s concealed by dense woodland. Survivors can access this location only by going through a long dirt road west of Rosewood. While seemingly mundane-looking above ground, you might want to think of it as an upside-down skyscraper, with rooms and hallways tunneling deep underground. This subterranean tower has 17 floors, with zombies lurking in every corner, making it one of the most unique POIs in the game!

Secret Military Research Facility Location

As mentioned earlier, travel west of Rosewood and follow a long dirt road to reach the secret military research facility in Project Zomboid. The in-game map doesn’t do a good job at making players see this location, allowing it to double down on its hidden profile. Instead, we'll provide step-by-step instructions for getting there. So first, fill up your vehicle with gas and head west from Rosewood. While on the road, turn onto the southern road that leads into the forest. Continue that path until you eventually reach heavily wooded terrain. Eventually, you’ll see a structure in a compound, indicating that you’ve arrived at your destination.

What to Expect at the Secret Military Research Facility

Make no mistake, as the secret military research facility in Project Zomboid isn’t for newcomers. Only travel to and attempt this location if you’re in the game’s late stages. Once in the compound, but still above ground, you’ll encounter structures like abandoned checkpoints, security buildings, and other military infrastructure. Below ground, however, the facility’s scale increases significantly. Here, you’ll find different areas, sections, and sub-facilities, including the following:

• Residential and barracks areas
• Command and administrative sections
• Cafeterias and recreational facilities
• Scientific laboratories
• Medical and morgue areas
• Storage and logistics rooms

The deeper you descend, the more dangerous the environment becomes. So, pace yourself, and don’t be afraid to retreat to fight another day. However, if you decide to stay and survive this challenging location, you’ll be rewarded with many military-themed loot. Some items to expect when looting the secret military research facility are as follows:

• Military backpacks
• Hazmat suits
• Military-Grade Weapons (e.g., M16 rifles, shotguns, and their respective ammunition)
• Skill books
• Various tools and materials

Best Tips for Surviving and Clearing the Secret Military Research Facility

While it’s not ideal to venture into the secret military research facility without significant preparation, it can be a good idea to attempt this “dungeon” while still early in the apocalypse. Over time, navigation through the dense forests surrounding the facility becomes increasingly difficult. Remember, getting to this location is only the tip of the iceberg. Surviving the upcoming onslaught is another story. Below are some strategies and tips to help you enter and exit this location without turning into one of the undead:

The Stairwell is Your Entrance and Exit

Before descending underground, eliminate as many zombies as possible on the surface. The last thing you’d want is for the undead to block your exit, which is also the facility’s only practical entrance. If you’re in a Project Zomboid server with allies, consider having a few people clearing zombies above-ground. The communications building and the helipad are ideal vantage points for this cause.

Defend Floor 13

Floor 13 of Project Zomboid’s secret military base is its first underground level. This floor can also serve as your temporary base, moving forward. Here, you’ll find resting areas, storage units, and security rooms. You or one of your allies should stay on this floor to defend it from straggling zombies. Then, those in your party who will continue moving forward should clear Floor 13’s main corridor first. Avoid rushing into side rooms immediately, as doing so will most likely attract more of the undead. Once cleared, enter the small rooms for the extra loot, or let the person guarding the area handle it.

Watch the Stairwells on Floor 14

Also known as the barracks, this level can be deceptively dangerous. This floor has two staircases that can allow zombies to flank your team unexpectedly. Again, move slowly, and clear one wing at a time. If a large undead horde appears, retreat to Floor 13’s defensive chokepoint. Request help from the person guarding this area, if needed. It’s ideal to clear Floor 14 first before moving further underground.

Use Crowd Control Strategies in Floor 15

Floor 15 of the secret military research facility generally has the highest concentration of zombies. This area, known for its cafeteria, meeting rooms, and recreational facilities, features large open spaces where hordes can gather. Although high-powered firearms can help eliminate zombie threats, guns usually take them out one by one. Instead, use throwables, like grenades and Molotovs. A fairly common strategy is to intentionally attract the massive horde so the zombies clump together. Then, throw Molotov cocktails on the bunched-up undead so the fire spreads far and fast.

Restock on Medical Supplies on Floor 16

The research floor of the secret military research facility has laboratories and medical sections. Here, stock up on any restorative items that you might find. Also, don’t rush to the armory. Doing so is a death sentence, as the path leading to that location has zombies emerging from multiple directions.

Uncover the Facility’s Secrets on Floor 17

Arguably, the loot in the secret military research facility is mediocre at best. This dungeon is a testing ground for zombie apocalypse survivors who are quite far into the endgame. Reaching the final floor of this military base is no different, as you’ll most likely find items here like tools and other resources commonly found in towns above ground. However, if you’re into Build 42’s enhanced environmental storytelling, you’ll find out more about what happened in this facility from this floor. So, check each corner before advancing, especially with Floor 17’s labyrinthine layout. If your team manages to eliminate all undead threats from this floor, consider yourself one of the brave few who have completed this location and lived to tell the tale.