What were the prototype Big Daddy characters called in the sequel version of the BioShock series?
Big Daddy (BioShock):  In its sequel, "BioShock 2", the player controls a prototype Big Daddy. BioShock 2:  Assuming control of Subject Delta, a hulking Big Daddy, players are tasked with fighting through "splicers", the psychotic human population of the city, using weapons and an array of genetic modifications.
Subject Delta