The Secret Factory Base MLO is one of the coolest hidden-style interiors you can add to GTA 5. It adds a fully detailed underground factory with realistic rooms props hallways and a secret entrance. Whether you’re setting up a roleplay hideout a mission base or a private HQ this MLO brings a fresh new location to the game.

What Is the Secret Factory Base MLO
This mod is a custom MLO interior built for GTA 5 that features a large multi-room factory hidden underground. It includes storage areas machinery offices security rooms tunnels and realistic lighting. Since it’s an MLO the entire space is fully enterable without loading screens—perfect for FiveM or single-player free-roaming.
How To Install
- Install OpenIV and make sure your mods folder is set up.
- Download the Secret Factory Base MLO mod.
- Extract the zip file using WinRAR or 7-Zip.
- Open the extracted folder and look for the dlc.rpf or mlo folder.
- In OpenIV go to mods/update/x64/dlcpacks/.
- Create a new folder named factorymlo (or the exact name provided by the mod).
- Place the mod’s dlc.rpf inside that folder.
- Go to mods/update/update.rpf/common/data/.
- Edit dlclist.xml and add the line: <Item>dlcpacks:/factorymlo/</Item>.
- Save the file launch GTA 5 and go to the location shown in the mod’s description to access the new secret base.
Conclusion
Installing the Secret Factory Base MLO is simple and adds a completely new world to explore inside GTA 5. With its underground layout and realistic design it’s perfect for roleplay missions or making your game feel more alive. Follow the steps load the map and enjoy your brand-new hidden factory base!
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