About
On Steam, 66% of 35,220 player reviews are positive (Mixed). 81 people are playing it on Steam right now, with a peak of 94 in the last 30 days. It is Verified on Steam Deck. The main story takes about 9.5 hours. It was nominated for 1 award.
In this narrative-driven, third-person survival horror game set 300 years in the future, the player will take on the role of Jacob Lee – a victim of fate thrown into Black Iron Prison, a maximum-security penitentiary located on Jupiter's moon, Callisto. When inmates begin to transform into monstrous creatures, the prison is thrown into chaos.
Story
Set on Jupiter’s dead moon Callisto in the year 2320, The Callisto Protocol casts players as Jacob Lee, an inmate in Black Iron Prison. When a mysterious outbreak throws the moon into chaos, Jacob must face his darkest fears to defeat the bloodthirsty creatures that stalk him as he unravels the dark mysteries at the heart of the powerful United Jupiter Company.
What is happening now
The Callisto Protocol is a sci-fi shooter-adventure that launched in December 2022 across current and last-generation consoles and PC. The game emerged from Striking Distance Studios, led by veteran developer Glen Schofield. Recently, Schofield announced his retirement from the industry, reflecting on the project's development and broader challenges facing AAA game production. His departure marks a notable transition for the studio behind the title.
How long to beat The Callisto Protocol
from 4 playersFrom the people behind The Callisto Protocol
shared cast and crewGames like The Callisto Protocol
same kind of game, other seriesCast and crew
1 creditsCrew
Awards
0 won, 1 more nominationMedia
Releases
Earliest full release on each platform; regional dates can differ.
PC and Steam Deck
Steam store pageSteam Deck: Verified works great out of the box
Requirements and Deck status as listed on Steam, checked Oct 28, 2026.
The Callisto Protocol player count
concurrent players on SteamPlayers counted on Steam every one to six hours; the daily peak is the highest count of the day.
The Callisto Protocol achievements
46 achievements on SteamRarest
All 46 achievements by how many players unlocked them
Share of Steam players who unlocked each achievement.