Hephaestus is a retooled environment for BioShock 2 Multiplayer of the Hephaestus from the first BioShock. Hephaestus is the main generator of power for all of Rapture. Jacob Norris, a multiplayer character, is said to have been one of the deep sea welders who built Rapture; it is known from his audio recording Rapture's Heart that he was present when construction on Hephaestus was finished.