Black Iron Prison, Callisto. Image: Striking Distance Studios / Krafton
The Callisto Protocol is a survival horror game from Striking Distance Studios, released on 2 December 2022. Led by Dead Space co-creator Glen Schofield, it aims squarely at that legacy. It is one of the best-looking horror games ever made and its gore technology is remarkable — but its melee-first combat and punishing checkpoints divided players sharply.
At a glance
| Developer | Striking Distance Studios |
| Released | 2 December 2022 |
| Platforms | PC, PS4, PS5, Xbox One, Xbox Series X|S |
| Setting | Black Iron Prison, Jupiter's moon Callisto, 2320 |
| Length | ~12–14 hours |
What is it about?
Cargo pilot Jacob Lee is imprisoned at Black Iron after his ship crashes on Callisto. An outbreak turns the inmates into mutating creatures called Biophages, and Jacob has to escape a facility that was never designed to let anyone out.
The story is competent and predictable. Its strength is the setting: Black Iron is a genuinely oppressive place, and the environmental design and lighting are exceptional throughout.
The combat is the whole argument
Unlike Dead Space, The Callisto Protocol is melee-first. Your primary weapon is a stun baton, and firearms are a supplement rather than the foundation.
Dodging works differently to almost any other game: you hold the left stick in a direction as an attack lands, and you must alternate directions rather than repeat. There is no dodge button and no timing window in the traditional sense.
The intended loop is dodge, dodge, counter, then swap to a firearm mid-combo to finish. When it works against one enemy it is brutal and satisfying.
Where it breaks down: against two or more enemies, the system has no good answer. You cannot dodge two attackers, and crowd control options are limited. This is the single most common criticism, and it is legitimate.
Post-launch updates added a New Game Plus mode, a Hardcore difficulty and combat refinements, but the fundamental design did not change.
Melee-first combat that excels one-on-one and struggles against groups.
How does it compare to Dead Space?
An unavoidable comparison, particularly since the Dead Space remake arrived only weeks later in January 2023.
- Visuals and gore — Callisto wins. The layered dismemberment system is technically superior to anything else in the genre.
- Combat — Dead Space wins clearly. Strategic dismemberment with ranged weapons is more flexible and better suited to multiple enemies.
- Level design — Dead Space wins. The Ishimura is interconnected; Black Iron is largely linear corridors.
- Atmosphere — close. Both are excellent, with Callisto leaning harder on grime and body horror.
If you can only play one, the Dead Space remake is the stronger game. Callisto is worth playing afterwards if you want more of the genre.
What about the checkpoints and difficulty?
Checkpointing was heavily criticised at launch — deaths often sent you back several minutes, and the elaborate death animations (which cannot be skipped quickly) made repeated failures grating.
The death animations are genuinely impressive the first few times and genuinely tiresome the twentieth. If you are struggling, dropping the difficulty is a reasonable choice; the game's appeal is atmosphere, not challenge.
PC performance — read this before buying
The PC version launched with severe shader compilation stutter, one of the worst examples of that era. Patches substantially improved it, but the game remains demanding.
Tuning advice: on first launch, let the game sit at the menu for a few minutes so shaders can compile before you start playing — this alone removes much of the remaining stutter. Ray tracing is very expensive here; disable it first. Enable upscaling on Quality. The game is VRAM-hungry, so drop texture quality one step if you have 8GB or less.
Is there DLC?
Yes, and unlike several games on this site's list, it is real paid content:
- Contagion Bundle — a harder difficulty mode with permadeath and no upgrades, plus cosmetics
- Final Transmission — a story expansion continuing directly from the main ending, roughly 2–3 hours
Final Transmission resolves the campaign's cliffhanger, which some players felt should have been in the base game. The Deluxe Edition bundles both.
Is it worth playing in 2026?
At a discount, yes — with expectations managed.
Play it if you want gorgeous, oppressive sci-fi horror and can tolerate a combat system built around one enemy at a time.
Skip it if you want the tactical flexibility of Dead Space, or if repeated deaths and long death animations will wear you down.
It sells cheaply now and has appeared in subscription catalogues, which is the right price for what it delivers.
Where can you buy it?
- PC — Steam and the Epic Games Store
- PlayStation — PlayStation Store (PS4 and PS5)
- Xbox — Microsoft Store
Buying advice
If you want the full story, get the Deluxe Edition — Final Transmission continues directly from the ending and is not included in the base game. The Callisto Protocol discounts steeply and regularly, and has appeared in Game Pass and PS Plus catalogues. Check those first.
A note on cracked builds: they are illegal, a known malware vector, and frozen at whichever version was cracked — which for this game very likely means the launch build with unpatched shader stutter, the version reviewers criticised most. IGGG Guides does not link to pirated software.
The Callisto Protocol FAQ
How long is The Callisto Protocol?
Around 12–14 hours for the main campaign, plus 2–3 for Final Transmission.
Is it connected to PUBG?
It was originally announced as being set in the PUBG universe, but that connection was dropped before release. It is a standalone story.
Is it scarier than Dead Space?
More graphically violent, but Dead Space is generally considered better at sustained tension because its level design creates more uncertainty.
Does it have New Game Plus?
Yes, added free after launch.
Is Final Transmission worth buying?
If the ending frustrated you, yes — it provides the resolution. As standalone content it is short.
Does it run well on PC now?
Much better than at launch. Let shaders compile at the menu before playing to avoid the remaining stutter.
The verdict
The Callisto Protocol is a visually stunning horror game attached to a combat system that only half works. Black Iron Prison is superbly realised, the gore technology is genuinely industry-leading, and one-on-one encounters are tense and physical.
Groups of enemies expose the design, and the checkpointing tests patience. Buy it cheap, play it for the atmosphere, and play Dead Space first.
Best for: horror fans who want atmosphere and body horror above mechanical depth.
Skip if: you want Dead Space — play the remake instead.
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- Borderlands 4 review — 150+ hours of gameplay insights
Last updated: 6 September 2026