freedm software package provides multiplayer-oriented maps for Doom, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install freedm
freedm is installed in your system.
Make ensure the freedm package were installed using the commands given below,
$ sudo dpkg-query -l | grep freedm *
You will get with freedm package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Games |
| Package | freedm |
| Version | 0.7-1 |
| Description | multiplayer-oriented maps for Doom |
| Sub Section | Games |