The Callisto Protocol is a narrative-driven, third-person survival horror game set 300 years in the future in which the player controls Jacob Lee, a prisoner thrown into Black Iron Prison, a maximum-security penitentiary located on Jupiter's moon, Callisto. When inmates begin to transform into monstrous creatures, the player must battle their way to safety to escape Black Iron Prison, while uncovering the dark and disturbing secrets around Callisto.
The player battles monstrous creatures that used to be humans and have been transformed by an unknown cause on Callisto.
The game features frequent violence, including use of melee and ranged weapons, to kill aggressive monstrous creatures that look human to varying degrees. There are frequently large amounts of blood and gore associated with the violence, including dismemberment.
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