Boom 3 is a Doom 3 and #Doom 3: Resurrection Of Evil GPL source port, known to work on Windows and Linux. Doom 3 is a sci-fi horror fantasy first-person shooter computer game developed by id Software and published by ActiVision.

Boom 3 can load pk4 files. The Boom 3 core requires game data files which can be found here: https://store.steampowered.com/app/9050/DOOM_3/ and here: https://store.steampowered.com/app/9070/. If you bought the game on CDs/DVD, base/pak000.pk4 - pak004.pk4 and d3xp/pak000.pk4 can be copied from the disks, the other files are from the patch.

On Linux (and probably other Unix-like systems and maybe even Windows with a mingw shell) you can extract the needed files from the official 1.3.1 patch for Linux with: https://files.holarse-linuxgaming.de/native/Spiele/Doom%203/doom3-linux-1.3.1.1304.x86.run

```
sh /path/to/doom3-linux-1.3.1.1304.x86.run --tar xvf --wildcards base/pak* d3xp/pak*
```

On Windows you can just install the game and the official 1.3.1 patch for Windows: https://archive.org/details/Doom_3_1.3.1 and then get the files from the installation directory (or copy dhewm3 in there).

!!! WARNING
Doom3 BFG is not supported.

You'll need the game data from a Doom3 installation patched to 1.3.1. Specifically, you'll need the following .pk4 files for the main game:

```
Filename Size MD5-sum
base/pak000.pk4 337MB 71b8d37b2444d3d86a36fd61783844fe
base/pak001.pk4 220MB 4bc4f3ba04ec2b4f4837be40e840a3c1
base/pak002.pk4 398MB fa84069e9642ad9aa4b49624150cc345
base/pak003.pk4 303MB f22d8464997924e4913e467e7d62d5fe
base/pak004.pk4 227MB 38561a3c73f93f2e6fd31abf1d4e9102
base/pak005.pk4 540KB 2afd4ece27d36393b7538d55a345b90d
base/pak006.pk4 214KB a6e7003fa9dcc75073dc02b56399b370
base/pak007.pk4 118KB 6319f086f930ec1618ab09b4c20c268c
base/pak008.pk4 12KB 28750b7841de9453eb335bad6841a2a5
```

... and (optionally) these .pk4 files for the Resurrection of Evil addon:

```
Filename Size MD5-sum
d3xp/pak000.pk4 514MB a883fef0fd10aadeb73d34c462ff865d
d3xp/pak001.pk4 98KB 06fc9be965e345587064056bf22236d2
```


An example folder structure would be like so:

```
└── contents/
└── doom3/
├── base/
│ ├── pak000.pk4
│ ├── pak001.pk4
│ ├── pak002.pk4
│ ├── pak003.pk4
│ ├── pak004.pk4
│ ├── pak005.pk4
│ ├── pak006.pk4
│ ├── pak007.pk4
│ └── pak008.pk4
└── d3xp/
├── pak000.pk4
└── pak001.pk4
```

Game saves and internal configuration files will be created in the content directory, organised in folders matching the filenames of loaded content - for example:

```
└── contents/
└── doom3/
└── base/
├── savegames/
│ ├── *.save
└── └── *.txt
```

Game saves are named from mission names.
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