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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 players
Main storyrushing through the story
9.5 h
Main + extrasstory plus side content
10 h

From the people behind The Callisto Protocol

shared cast and crew

Games like The Callisto Protocol

same kind of game, other series

Cast and crew

1 credits

Crew

Awards

0 won, 1 more nomination

Media

The Callisto Protocol screenshot

Releases

Platform
Date
December 2, 2022
December 2, 2022
December 2, 2022
December 2, 2022
December 2, 2022

Earliest full release on each platform; regional dates can differ.

PC and Steam Deck

Steam store page

Steam Deck: Verified works great out of the box

Minimum
Recommended
OS
Windows 10/11
Windows 10/11
Processor
Intel® Core™ i5-8400 or AMD Ryzen™ 5 2600
Intel® Core™ i7-8700 or AMD Ryzen™ 5 3600
Memory
8 GB RAM
16 GB RAM
Graphics
NVIDIA® GeForce® GTX 1060 or AMD Radeon™ RX 580
NVIDIA® GeForce® GTX 1070 or AMD Radeon™ RX 5700
DirectX
Version 11
Version 12
Storage
75 GB available space
75 GB available space
Additional Notes
-
SSD recommended

Will it run on my PC?

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Requirements and Deck status as listed on Steam, checked Oct 28, 2026.

The Callisto Protocol player count

concurrent players on Steam
81playing now2h ago
81peak today
9430-day peak
94highest we have seenOct 25, 2026
Oct 23: 77 Oct 24: 92 Oct 25: 94 Oct 26: 82 Oct 27: 61 Oct 28: 66 Oct 29: 70 Oct 30: 73 Oct 31: 84 Nov 1: 90 Nov 2: 81
Oct 23daily peak, last 11 daystoday

Players 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 Steam

Rarest

You Belong Here Finish Game in Contagion Mode Without Dying
1.1%
Glutton for Punishment Finish Game in Contagion Mode
1.2%
Lifer Finish Game in Hardcore Mode NG+
1.4%
Big Game Hunter Complete Wave 50
1.6%
Bear Trap Kill a Two-Head with a Hazard
2%
Subject Alpha Use the Power-up 10 times
2%
All 46 achievements by how many players unlocked them
Don't Let It Mellow Destroy all Hammer Crates on the Factory Floor
2.3%
Hoard Mode Survive five consecutive waves without spending any Credits
2.6%
Quick Pick Solve any Security Lock System in less than 7 seconds
2.6%
Recidivist Finish Game in Hardcore Mode
2.7%
Big Spender Spend 20,000 Credits
3.1%
Information Overload Find all 8 Protocol Data Drives
3.5%
Parole Denied Finish New Game Plus Mode
3.6%
This Isn't About Escape Locate the Escape Pod
4%
Instigator Complete Riot Mode for the first time
4.3%
Armed to the Teeth Purchase all weapons and upgrades
4.6%
I am the Danger Dismember 100 limbs in Riot Mode
4.8%
Grim Reaper
5.6%
The Protocol is About Life
6.4%
Mugshot
9.5%
One Last Job Finish Final Transmission
10.3%
It's Time Obtain the Kinetic Hammer
11%
Keep Fighting Killed your first Biobot!
11.8%
In Striking Distance
19.5%
The Commonality
20.1%
You Need a Gun
35.2%
Float Like A Butterfly
36%
Giving Back Stab five blind enemies in the back
39.6%
I Do Belong Here
39.8%
Terminated
41.1%
Full Circle
42.6%
What Lies Beneath
42.7%
Two Heads Are Better Than One
44.8%
Power Up
45.9%
In the Pipe, Five by Five
48.4%
Crash Site
48.6%
Get a Grip
55.1%
Without A Paddle
55.5%
Chew 'Em Up
59.6%
Workplace Hazard
62.2%
If the SHU Fits...
64.9%
Reforged Print a weapon upgrade
69.8%
Paper Jams Print a weapon for the first time
75.8%
Flesh Wound
86.8%
Desperate Times
88.2%
The Outer Way
90.9%

Share of Steam players who unlocked each achievement.

In the news

4 stories