` with your steam login name)
When it's done you should have the normal windows installation of doom3 in `./doom3/`
and the needed files in `./doom3/base/`
It should be possible to get the *Resurection of Evil* data in the same way,
by replacing `9050` with `9070`; the files should be in `./doom3/d3xp/` then.
By the way, that number is the "AppID" of Doom3/RoE; if you wanna use this to
get the data of other games you own, you can look up the AppID at [SteamDB](https://steamdb.info/).
### Using the Doom3 Demo gamedata
First you need to download the Doom3 Demo, of course.
For **Windows**, you can get [D3Demo.exe at Fileplanet](https://www.fileplanet.com/archive/p-15998/DOOM-3-Demo)
and just run the installer.
For **Linux** (and **other operating systems** that have a POSIX-compatible shell and `tar`)
you can download [doom3-linux-1.1.1286-demo.x86.run from Holarse](https://files.holarse-linuxgaming.de/native/Spiele/Doom%203/Demo/doom3-linux-1.1.1286-demo.x86.run)
or some other page that has that file.
Then you can extract the relevant file from the .run installer with
> `sh doom3-linux-1.1.1286-demo.x86.run --tar xf demo/`
You'll need `demo/demo00.pk4` for playing, either in exactly that directory, or you can copy it into `base/`.
Note that you **don't need the patches** of the full version, adding their pk4s when using Demo gamedata breaks the game.
`demo00.pk4` has a size of 462MB but there are minimal differences between the one
for Linux and Windows, so they have different md5sums:
Windows : md5sum bd410abbb649b9512d65b794869df9fe size 483534533 Bytes
Linux : md5sum 70c2c63ef1190158f1ebd6c255b22d8e size 483535485 Bytes
Both work on all platforms though, but the Linux demo had been released two months after
the Demo for Windows and contains at least one tiny bugfix: A missing string for `" or "`
which is used when binding multiple keys to the same action - the Windows Demo shows
a nonsense string instead.
## Getting dhewm3 executables
On **Windows** you can just download the Win32 binaries from the [Download page](https://github.com/dhewm/dhewm3/releases/latest).
You can either extract them into your Doom3 installation directory, or into a fresh
directory and copy the needed game data ([see above](#getting-the-doom3-game-data)) in there.
Similarly, you can find x86_64 (amd64) **Linux** binaries there.
On Linux and *BSD it might be that your package manager provides a dhewm3 package/port that
you can install; please refer to that packages documentation on where to put the game data.
You could also try telling dhewm3 where to find the game data with:
> `dhewm3 +set fs_basepath /home/HansWerner/Games/doom3`
(adjust the path to your needs)
If your package manager does not provide dhewm3 (or you're on macOS/OSX and there is none),
or you want to use the very latest code, you'll have to compile it yourself.
It's not super hard, see [the README](https://github.com/dhewm/dhewm3/blob/master/README.md#compiling)
for details on compiling and [the FAQ](https://github.com/dhewm/dhewm3/wiki/FAQ#where-do-i-need-to-put-the-game-data-files)
on where to put the game data.