Underground Bases
Build a covert, multi-level underground shelter with upgrade tiers for storage, living space, and stronger materials.
Perfect for survivors who prefer staying off the skyline.
Mod Credit
Created by Shelby's Workshop.
This guide summarizes the mod for Project DayZ players. All original content and concepts belong to the mod author(s).
Special thanks (from the mod author): DaemonForge, ChrisPBacon, Shelby, IceBlade, HunterzCZ, | RaG | Tyson, MDC, Gormirn, Lad, and BullsEyE.
Why It Matters
Underground bases give you a strategic advantage: safer gear storage, better concealment, and a strong fallback when the surface turns ugly.
Each level expands what your bunker can do — from basic storage to reinforced space and utility.
Example Builds
These screenshots show what underground setups can look like once upgraded and customized.
Key Features
3 Upgrade Levels
Progress from a basic underground hatch to expanded rooms and stronger materials.
Strategic Advantage
Use concealment for storage, observation setups, and safer “reset” points after rough fights.
Personalization
Set each level up your way: sleeping space, crafting, storage, camouflage, and more.
Security
Fortify entrances with locks (code lock or combo lock, depending on your setup).
How To Build
The build flow is simple: start with a hidden entrance, then upgrade from inside as you progress.
Level 1 (Entrance Hatch)
1) Find a flat, hidden spot for the entrance.
2) Use a shovel to dig the entrance hole.
3) Attach: 6 wooden logs, 99 nails, 40 planks.
4) Put a hatchet in hands and build the Level 1 underground hatch.
Level 2 (Upgrade From Inside)
2) Use a shovel to dig the entrance hole.
3) Attach: 6 wooden logs, 99 nails, 40 planks.
4) Put a hatchet in hands and build the Level 1 underground hatch.
1) While inside, put a shovel in hands, look at the floor/wall and select Upgrade Base.
2) Attach: 6 wooden logs, 99 nails, 20 sheet metal, 40 planks.
3) Put a hatchet in hands and Upgrade Base to Level 2.
Level 3 (Reinforced Upgrade)
2) Attach: 6 wooden logs, 99 nails, 20 sheet metal, 40 planks.
3) Put a hatchet in hands and Upgrade Base to Level 2.
1) While inside, put a shovel in hands, look at the floor/wall and select Upgrade Base.
2) Attach: 6 wooden logs, 99 nails, 20 sheet metal, 5 concrete blocks.
3) Put a hatchet in hands and Upgrade Base to Level 3.
2) Attach: 6 wooden logs, 99 nails, 20 sheet metal, 5 concrete blocks.
3) Put a hatchet in hands and Upgrade Base to Level 3.
Credit: Underground Bases mod by Shelby's Workshop. Special thanks list provided by the mod author.