Chocolate Doom is a conservative,
historically-accurate Doom source port, which is compatible with
the thousands of mods and levels that were made before the Doom
source code was released. Unlike other source ports, the goal
is to preserve the original look, feel, limitations, and bugs of
the original DOS executable.

Full support for single- and multi-player games is provided, for
all of the original Doom games, Chex Quest, and Hacx. Unlike
the original executable, network play is implemented on the IP
network stack, allowing it to function on modern LANs and the
Internet.

The easiest way to run Chocolate Doom is to copy a
supported game file (known as a "WAD") to the root of your home
directory and launch the application. If you have trouble with
the automatic game file detection or need to manage multiple WAD
files, you can run the application from the command line with a
path to the selected game file:

flatpak run org.chocolate_doom.Doom -iwad ~/PATH/TO/GAME.WAD