os ▁to ▁observe ▁the ▁feed ing ▁hab its ▁and ▁physical ▁movements ▁of ▁birds ▁and ▁re pt iles , ▁such ▁as ▁o str ich es ▁and ▁all ig ators . ▁ ▁Jur ass ic ▁Park ▁was ▁the ▁first ▁game ▁by ▁S ega ▁to ▁be ▁developed ▁using ▁Sil icon ▁Graphics ▁computers ▁at ▁the ▁company ' s ▁new ▁development ▁facility ; ▁such ▁computers ▁were ▁previously ▁used ▁to ▁create ▁computer - generated ▁din osa urs ▁for ▁the ▁film . ▁The ▁ 3 D ▁models ▁for ▁the ▁game ' s ▁din osa urs ▁were ▁created ▁using ▁stop ▁motion ▁phot ography ▁while ▁a ▁team ▁member ▁was ▁fil med ▁acting ▁out ▁Grant ' s ▁movements ▁and ▁was ▁then ▁digit ized . ▁Many ▁din osa ur ▁models ▁used ▁for ▁the ▁film ▁were ▁sent ▁to ▁the ▁game ' s ▁development ▁studio ▁so ▁they ▁could ▁also ▁be ▁fil med ▁and ▁digit ized ▁while ▁in ▁motion . ▁A ▁$ 7 5 , 0 0 0 ▁V elo ci ra pt or ▁pu ppet ▁from ▁the ▁film ▁was ▁also ▁used ▁for ▁production ▁of ▁the ▁game . ▁The ▁game ▁features ▁" Art ific ial ▁Din osa ur ▁Int elligence " ▁that ▁causes ▁the ▁din osa ur ▁enemies ▁to ▁react ▁differently ▁every ▁time ▁a ▁level ▁is ▁played , ▁giving ▁the ▁player ▁a ▁unique ▁experience ▁each ▁time . ▁ ▁Element s ▁from ▁Michael ▁Cr icht on ' s ▁novel , ▁Jur ass ic ▁Park , ▁were ▁featured ▁in ▁the ▁game , ▁including ▁the ▁presence ▁of ▁pro com ps ogn ath us ▁and ▁p ter an od ons ,