<prompt> I-Passage: Doom 3 isethwe ngonyaka ka-2145. Ingxenye enkulu yendaba nengxoxo yomdlalo yadalwa ngumbhali uMatthew J. Costello. Ngokwe-backstory yomdlalo, i-Union Aerospace Corporation UAC ikhule yaba yinhlangano yezinkampani enkulu kunazo zonke ekhona, futhi isungule indawo yocwaningo eMars. Kulesi sisekelo, i-UAC iyakwazi ukwenza ucwaningo ezindaweni eziningana zesayensi, kufaka phakathi ukuthuthukiswa kwezikhali ezithuthukile, ucwaningo lwebhayoloji, ukuhlola isikhala kanye nokudluliswa kwemishini. EMars, i-UAC ingenza imisebenzi yayo ngaphandle kwemingcele yezomthetho neyokuziphatha.  <response>: UMatthew J. Costello 