Initially, Interplay hired dark ambient musician Lustmord to create the musical score for the game. He worked on the project for four months, writing over 40 original pieces. However, just six weeks before the game released, one of the producers had a change of heart on the game's musical direction, who wanted it to sound less ambient and "more along the lines of John Williams". His first time working on a video game project, Lustmord considered the experience "terrible", eventually reusing some of the elements from the score in his 2001 album, Metavoid. Needing a replacement soundtrack done quickly, Interplay then reached out and asked Mark Morgan, who had worked on other Black Isle Studios games, to do it. Two additional themes were penned by Richard Band. The game's cast of voice actors included Michael T. Weiss, Sheena Easton, Rob Paulsen, Mitch Pileggi, Dan Castellaneta, Keith David, Jennifer Hale, John de Lancie, and Tony Jay.
initIally, interplay hired DArk ambienT Musician lUStmord to creaTe the mUSICAl ScOrE foR The GAMe. he wOrKEd On The projeCT For fOur MonthS, WRItiNg over 40 OrigiNAL pieces. hOweveR, juSt sIx wEeks BefOre tHe gAMe reLeAsED, OnE oF the proDucerS had a chanGe of heart oN The game'S musiCal direction, whO wANTed it To sOUNd Less AmbIent and "moRE alonG THe lines OF john WilliAms". hIs fIrsT timE WorkiNG oN a viDeO GamE ProjECT, lUsTmord ConsiDErEd THe experiEncE "tERRIBlE", eveNtuallY reuSing soME of the eleMEnTs froM The scoRe in HIs 2001 aLbum, meTAvOiD. NeEdINg a replAcemENT souNdtRaCk DOnE QUicklY, iNtErpLaY THen reAcHed out aNd askEd Mark mOrgAn, who hAD woRkED oN othEr blACK isle sTuDIos gamEs, To do iT. tWo additionAl themEs WEre peNned by riCHARd banD. thE game's cAst of voice actOrs includED michaEl t. WeiSs, sHeenA eAston, rob pAUlsen, MitcH pileGgi, DAn casTEllaNeta, keITH DAviD, JeNnifer halE, john dE LancIe, and toNy JaY.