Unlock the first upgrade that reshapes Calisto Protocol’s grim sandbox and reshuffles every fight.
If The Callisto Protocol is any indication, capitalism is still gonna be around in the future. The sci-fi horror game features in-game currency – fittingly called Callisto Credits – that’s directly tied to all RPG-like upgrades for both protagonist Jacob and all of his weapons. The problem is that these skills aren’t exactly cheap, nor are Callisto Credits abundant. By the time you’re about to reach the last chapter of the story, it’s likely that you won’t have everything maxed out.
As such, we’ll guide you in your impulsive purchases in The Callisto Protocol by detailing how to spend your precious credits properly, and what you should avoid in general. Friendly advice: If you’re feeling reckless and decide to go ahead with a purchase either way, do yourself a favor and make a manual save first in case you regret your decision afterwards.
The best upgrades in The Callisto Protocol
Upgrading the stun baton should be your first priority, as it boosts both damage output and crowd control against tougher enemies. Focus on enhancing heavy attack power and blocking efficiency to make close combat more manageable. Next, invest in the GRP module to increase grip strength and recharge speed, allowing you to throw enemies into hazards more often. Finally, upgrade your firearms, especially the Hand Cannon and Riot Gun, to balance your arsenal for both ranged and close encounters.
At a glance, here is the order of priority in which you should spend your Callisto Credits in The Callisto Protocol:
- Baton upgrades
- Weapon upgrades
- GRP upgrades
- Health items and ammo
Your baton is your best friend, your pal, your everything. You’re bound to run out of ammo fast, so many encounters are best approached in close-quarters combat during the beginning of the game. But hey, in both the middle and final stretches of the game, you’ll still rely on your baton most of the time. Making sure it hits as hard as it can by upgrading its damage, as well as unlocking the heavy attack and additional blocking perks, will go a long way. For the first you’ll need the Riot Control Swing from the skill tree on the left, while Blocking Protection from the middle tree is a great option.
The best weapon upgrades in The Callisto Protocol
Upgrading the Stun Baton should be your first priority, as its damage and combo extensions dramatically improve your chances in close combat. Focus next on the GRP glove, which lets you control enemy positions and conserve ammunition by throwing foes into hazards. Once those are upgraded, invest in firearms such as the Hand Cannon or Riot Gun to boost stopping power and precision. Balancing melee and ranged upgrades ensures you stay ready for every encounter, especially during tight resource situations.
In terms of weapons, this one is complicated. I recommend purchasing every new schematic you find in order to unlock the corresponding gun. This will create another source of ammo. Yes, the general ammo you can find will become more sparse, but toward the second half of The Callisto Protocol, having more options to circle between when it comes to weapons is key.
As for specific weapon upgrades, spending Callisto Credits on the most expensive options, which add an alternate fire mode, is rarely worth it. You’ll consume a ridiculous amount of ammo, and the resulting boost you get to your damage isn’t exactly a great ROI, as enemies will continue to be tough regardless. As such, upgrading damage is always a good choice, as well as magazine capacity. Not having to reload as often is frankly a perk on its own.
The best GRP upgrades in The Callisto Protocol
Upgrading the GRP is key to surviving tougher encounters, as it allows you to control enemies and manage the battlefield with greater ease. Focus first on increasing its energy capacity and recharge speed, so you can grab and throw more enemies without constantly searching for batteries. Enhancing its launch strength is also valuable, letting you hurl opponents into hazards for quick kills. A fully upgraded GRP turns environmental traps into deadly tools, saving both ammo and time during intense fights.
Regarding your GRP – the thing that allows you to use telekinesis powers – it’s definitely worth improving the general GPR capacity. The upgrades aren’t cheap, so do so every now and then as it’s definitely not a priority. That said, the skill path on the right that focuses on the general speed of throws, while using the ability is definitely worth investing in. For the GRP Velocity, get the small and medium upgrades so you can save some credits.
Ultimately, shops allow you to purchase health items and ammo, which is helpful. but only when you’re in dire need of either. If you’re stuck on an encounter due to lack of ammo and you’re able to return to a shop station, that’s a good opportunity to purchase a few magazines. But it’s wiser to simply be extremely attentive as you play: Always double check that you’ve looted every possible corpse nearby by stomping them, and be sure to search for any chests or boxes you might have missed.
How to earn Callisto Credits in The Callisto Protocol
Callisto Credits are your main resource for purchasing upgrades and gear, so collecting them consistently makes a big difference. You can earn them by looting enemy corpses, exploring hidden areas for chests, and selling contraband items like energy converters or circuitry at Reforge stations. Make sure to break open storage boxes and check side rooms-some of the best credit drops are found off the main path. Recycling unwanted weapons or equipment also provides a small but steady boost to your funds.
As previously mentioned, Callisto Credits are usually hard to find in The Callisto Protocol – at least in amounts that actually make a difference. Always keep an eye on CPU printers, decoders, and any other items that are labeled as parts eligible for selling. They have no other purpose, so go ahead and sell them away. Anything with the “pristine” label indicates that they’re worth double the usual amount, so if you’re running out of room in your inventory, switching a regular item for a pristine one is the way to go.
Then it’s only a matter of looking for chests and boxes in rooms off the beaten path, stomping on every enemy after you take them down, and just generally being mindful of your purchases overall. Sometimes it’s best to save Callisto Credits for an expensive upgrade rather than buying two small ones that won’t really account for much in the long run.
How to find Callisto Credits early in the game
Finding Callisto Credits early in The Callisto Protocol requires thorough exploration and smart combat habits, as they’re scattered sparingly in the initial chapters. Prioritize looting every enemy and container while conserving ammo for upgrades.
Enemy Drops
Stomp on defeated biophages (infected enemies) after kills-they have a random chance to drop credits, ammo, or health, with higher odds for credits if your health and ammo are near full. Only stomp fresh kills; dead bodies yield nothing.
Containers
Search storage chests, lockers (especially in locker rooms), and empty prison cells for credit bundles. Check optional Beta Paths for extras, but watch for traps like bug chests or enemy ambushes.
Sell Items
Vendor useless items like Energy Converters, Printers, and Decoders at Reforge Stations for quick credits. Sell excess medkits if you’re healthy, as drops ramp up when low on health.
Early Tips
Loot everything to minimize buying ammo/health, freeing credits for Stun Baton/GRP upgrades. Credits grow more common later, so focus melee over guns early.
Best early game areas for credit farming in Black Iron Prison
In The Callisto Protocol, Black Iron Prison (Chapters 1-3) offers limited but reliable credit farming through thorough exploration rather than repeatable spots. Focus on optional paths and enemy-heavy zones for consistent pickups.
Cargo Bay Area
Clear the initial Cargo Bay thoroughly-stomp every enemy after melee kills for credit drops, and smash lockers/crates near the starting shuttle and security room. Beta Path here yields a hidden chest with 200+ credits amid minor enemies.
Cell Block Beta
In the prison cells section, backtrack through opened cells and the guard room for scattered credit bundles (50-100 each). The optional upper walkways have stompable foes and a sellable Energy Converter in a corner locker.
Processing Areas
Rerun the grinder room fights via save/load if needed-stomp amplified enemies for higher drop rates. Check the nearby Reforge Station side rooms for overlooked containers holding 100-150 credits total.
Farming Tips
Always enter with full health/ammo to maximize enemy drops; sell excess items immediately. These spots net 500-800 credits per full clear early on, prioritizing Stun Baton upgrades.
