In the furthest reaches of space, mankind has uncovered something lurking in the darkness. Survive the horrors of Jupiter's dead moon in The Callisto Protocol for PlayStation 4. You are Jacob Lee, an inmate of the maximum-security Black Iron Prison quietly serving your sentence. But when your fellow convicts start to transform into monstrous creatures, you must do everything you can to fight back against the crawling chaos. Scavenge whatever weapons you can find as you delve into the secrets buried beneath the surface, and use different tactics to outwit the horde. What mysteries lie at the heart of the United Jupiter Company? It's up to you to find out.