 Once "Core" had been released, Rare hoped to use the same technology to fasten the development of "Vengeance".Seavor mentioned "Deus Ex" as an inspiration, stating that "Core" "wasn't as narrow as something like "Call Duty" , where it's like, walk, cutscene, walk, cutscene.It was definitely going to be, you could go over here and do this over here, or you could go over here and do this over here.