Aquest treball és programari lliure. Podeu redistribuir-lo i modificar-lo sota els termes de la Llicència Pública General GNU (GNU GPL), publicada per la Free Software Foundation; en la seva versió número 2 o en qualsevol posterior. Aquesta obra es distribueix sota l'esperança que sigui d'utilitat, però sense cap mena de garantia, fins i tot sense la garantia implícita de comercialització o d'adequació per a un propòsit particular. Vegeu els texts de la versió 2 i de la versió 3 de la GNU GPL per a més detalls.http://www.gnu.org/licenses/gpl.htmlGPLGNU General Public Licensetruetrue
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of The author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
This software is provided by The author and contributors "as is" and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall The author and contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.
Nota: si aquesta captura de pantalla mostra una obra que no no és el resultat directe del codi del programari que cita, així com un text o gràfic que no forma part del programari, la llicència per aquesta obra s'ha d'indicar per separat.
{{Information |Description={{en|Playing the FreeDoom IWAD in the PrBoom engine}} |Source=own screenshot |Date=13th February 2007 |Author=andersersej |Permission=[http://freedoom.sourceforge.net/deutex/COPYING FreeDoom] [http://sourcef