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Esta obra é software libre; podes redistribuíla e/ou modificala segundo os termos da licenza pública xeral GNU publicada pola Free Software Foundation, versión 2 ou calquera outra posterior. Esta obra distribúese coa esperanza de que poida ser útil, pero sen ningunha garantía; nin sequera a garantía implícita de comercialización ou adecuación a unha finalidade específica. Olla a versión 2 e mais a versión 3 da licenza pública xeral GNU para obter máis detalles.http://www.gnu.org/licenses/gpl.htmlGPLGNU General Public Licensetruetrue
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{{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