Players can purchase upgrades for weapons and other items in The Callisto Protocol. Read on to learn more about the Reforge Weapon Upgrades, their costs, and how to upgrade weapons.

All Reforge Weapon Upgrades and Cost

Jump to a Weapon Upgrade Tree
Hand Cannon	Stun Baton	GRP	Skunk Gun
Riot Gun	Tactical Pistol	Assault Rifle

Hand Cannon Upgrades

BI-55 Pistol Hand Cannon Upgrade Tree
TK23 Boom Bullets
Magnum Rounds Damage Upgrade
Stability Upgrade	High Capacity Magazine Upgrade
BI-55 Pistol Hand Cannon Base Weapon

TK23 Boom Bullets

Weapon Upgrade	Pre-Requisite	Credits Effect
TK23 "Boom Bullets"	Magnum Rounds Damage Upgrade	1800 Credits Adds alt-fire module that fires explosive rounds. Rounds explode on a delay after impact.

Magnum Rounds Damage Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Magnum Rounds Damage Upgrade	Stability Upgrade	600 Credits Increases the damage of the BI-55 Pistol.

Stability Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	None	200 Credits Reduces weapon recoil.

High Capacity Magazine Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
High Capacity Magazine Upgrade	Stability Upgrade	200 Credits Increases ammo capacity of the BI-55 Pistol.

Stun Baton Upgrades

Stun Baton Upgrade Tree
Damage Upgrade Level 2	Blocking Feedback Damage	Targeting Module Upgrade
Damage Upgrade Level 1	Blocking Protection	Block Break
Riot Control Swing	Blocking Counter Attack	Increased Velocity Alloy Sheath
	Stun Baton Base Weapon

Damage Upgrade Level 2

Weapon Upgrade	Pre-Requisite	Credits Effect
Damage Upgrade Level 2	Damage Upgrade Level 2	2700 Credits Maxes out the damage of the Stun Baton.

Damage Upgrade Level 1

Weapon Upgrade	Pre-Requisite	Credits Effect
Damage Upgrade Level 1	Riot Control Swing	900 Credits Increases Stun Baton damage.

Riot Control Swing

Weapon Upgrade	Pre-Requisite	Credits Effect
Riot Control Swing	None	300 Credits Unlocks a new, heavier attack. Ideal for extreme situations requiring damage over control.

Blocking Feedback Damage

Weapon Upgrade	Pre-Requisite	Credits Effect
Blocking Feedback Damage	Blocking Protection	2700 Credits Allows you to release a retaliatory charge when blocking a strike.

Blocking Protection

Weapon Upgrade	Pre-Requisite	Credits Effect
Blocking Protection	Blocking Counter Attack	900 Credits Take less damage when blocking.

Blocking Counter Attack

Weapon Upgrade	Pre-Requisite	Credits Effect
Blocking Counter Attack	None	300 Credits Unlocks a new low attack for use following a successful block of an enemy's final attack. Opens the enemy to follow-up attacks.

Targeting Module Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Targeting Module Upgrade	Block Break	2700 Credits Increases the chance of an aim snap to the center of mass or exposed virus following a combo ender.

Block Break

Weapon Upgrade	Pre-Requisite	Credits Effect
Block Break	Increased Velocity Alloy Sheath	900 Credits Breaks an enemy's arm if they block your attack.

Increased Velocity Alloy Sheath

Weapon Upgrade	Pre-Requisite	Credits Effect
Damage Upgrade Level 2	Damage Upgrade Level 2	2700 Credits Maxes out the damage of the Stun Baton.

GRP Upgrades

GRP (Gravity Restraint Projector) Upgrade Tree
GRP Recharge Speed Upgrade - Max	Energy Upgrade - Max	GRP Velocity Upgrade - Max
GRP Recharge Speed Upgrade - Medium	Energy Upgrade - Medium	GRP Velocity Upgrade - Medium
GRP Recharge Speed Upgrade - Small	Energy Upgrade - Small	GRP Velocity Upgrade - Small
	GRP (Gravity Restraint Projector) Base Weapon

GRP Recharge Speed Upgrade - Max

Weapon Upgrade	Pre-Requisite	Credits Effect
Energy Upgrade - Max	Energy Upgrade - Medium	2700 Credits Maxes out the GRP's energy capacity.

GRP Recharge Speed Upgrade - Medium

Weapon Upgrade	Pre-Requisite	Credits Effect
Energy Upgrade - Medium	Energy Upgrade - Small	900 Credits Increases the GRP's max energy capacity.

GRP Recharge Speed Upgrade - Small

Weapon Upgrade	Pre-Requisite	Credits Effect
Energy Upgrade - Small	None	300 Credits Increases the GRP's max energy capacity.

Energy Upgrade - Max

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Recharge Speed Upgrade - Max	GRP Recharge Speed Upgrade - Medium	2700 Credits Maxes out the GRP's recharge rate.

Energy Upgrade - Medium

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Recharge Speed Upgrade - Medium	GRP Recharge Speed Upgrade - Small	900 Credits Improves the GRP's recharge rate.

Energy Upgrade - Small

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Recharge Speed Upgrade - Small	None	300 Credits Increases the GRP's recharge rate.

GRP Velocity Upgrade - Max

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Velocity Upgrade - Max	GRP Velocity Upgrade - Medium	2700 Credits Maxes out the GRP's launch strength. Target can impact at near fatal speeds.

GRP Velocity Upgrade - Medium

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Velocity Upgrade - Medium	GRP Velocity Upgrade - Small	900 Credits Further increases the GRP's launch strength. Targets can be greviously injured including limb loss.

GRP Velocity Upgrade - Small

Weapon Upgrade	Pre-Requisite	Credits Effect
GRP Velocity Upgrade - Small	None	300 Credits Increases the GRP's launch strength. Targets can be injured on impact.

Skunk Gun Upgrades

Skunk Gun Upgrade Tree
	Swarming Rounds
Magnum Rounds Damage Upgrade	Stability Upgrade
	High Capacity Magazine Upgrade
	Skunkworks Shotgun "Skunk Gun" Base Weapon

Swarming Rounds

Weapon Upgrade	Pre-Requisite	Credits Effect
High Capacity Magazine Upgrade	None	400 Credits Increases the ammo capacity of the Skunk Gun.

Magnum Rounds Damage Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	None	300 Credits Reduces weapon recoil.

Stability Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Magnum Rounds Damage Upgrade	Stability Upgrade	1200 Credits Increases the damage of the Skunk Gun.

High Capacity Magazine Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	High Capacity Magazine Upgrade	1200 Credits Reduces weapon recoil.

Riot Gun Upgrades

RIot Gun Upgrade Tree
	Explosive Rounds Upgrade
	High Capacity Magazine Upgrade
Magnum Rounds Damage Upgrade	Stability Upgrade
	Riot Gun Base Weapon (TK4 Riot Shotgun)

Explosive Rounds Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Explosive Rounds Upgrade	High Capacity Magazine Upgrade	2700 Credits Upgrades the Riot Gun's projectiles, which explode shortly after impact. Deals extra damage to anything within the blast radius.

High Capacity Magazine Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
High Capacity Magazine Upgrade	Stability Upgrade	900 Credits Increases the ammo capacity of the Riot Gun.

Magnum Rounds Damage Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Magnum Rounds Damage Upgrade	Stability Upgrade	300 Credits Increases the damage of the Riot Gun.

Stability Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	None	300 Credits Reduces weapon recoil.

Tactical Pistol Upgrades

Tactical Pistol Upgrade Tree
TK33 "Burst Mode"
High Capacity Magazine Upgrade	Stability Upgrade
Magnum Rounds Damage Upgrade
Tactical Pistol Base Weapon

TK33 Burst Mode

Weapon Upgrade	Pre-Requisite	Credits Effect
TK33 "Burst Mode"	High Capacity Magazine Upgrade	3600 Credits Adds alt-fire module with high-damage 5 round burst.

High Capacity Magazine Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
High Capacity Magazine Upgrade	Magnum Rounds Damage Upgrade	900 Credits Increases the ammo capacity of the Tactical Pistol.

Stability Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	High Capacity Magazine Upgrade	900 Credits Reduces weapon recoil.

Magnum Rounds Damage Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Magnum Rounds Damage Upgrade	None	300 Credits Increases the damage of the Tactical Pistol.

Assault Rifle Upgrades

Assault Rifle Upgrade Tree
TK63 "Homing Rounds"	Stability Upgrade
	Magnum Rounds Damage Upgrade
	High Capacity Magazine Upgrade
	Assault Rifle Base Weapon

TK63 Homing Rounds

Weapon Upgrade	Pre-Requisite	Credits Effect
TK63 "Homing Rounds"	Stability Upgrade	4500 Credits Adds alt-fire module that fires smart ammunition. Fired rounds adjust themselves to hit moving targets.

Stability Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Stability Upgrade	Magnum Rounds Damage Upgrade	4500 Credits Reduces weapon recoil.

Magnum Rounds Damage Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
Magnum Rounds Damage Upgrade	High Capacity Magazine Upgrade	1500 Credits Increases the damage of the Assault Rifle.

High Capacity Magazine Upgrade

Weapon Upgrade	Pre-Requisite	Credits Effect
High Capacity Magazine Upgrade	None	500 Credits Increases the ammo capacity of the Assault Rifle.

How to Upgrade Weapons

Use Callisto Credits at the Reforge

Players can upgrade weapons and other items by purchasing them at the Reforge with Callisto Credits. If a player has insufficient credits, items like Energy Converter or Contraband Pack can be sold for Callisto Credits.

How to Farm Callisto Credits

The Callisto Protocol Related Guides

Tips and Tricks:
Beginner's Guide to The Callisto Protocol

All Tips & Tricks

Skins and Cosmetics
List of Skins	How to Get the Biophage Skin
How to Get the Retro Prisoner Skin	How to Get the Founder's Pack
How to Get the Engineer Skin	How to Get Watchtower Skin
How to Get Outer Way Skin	-
Game Mechanics & Upgrades
All Reforge Weapon Upgrades	Inventory Upgrade Guide
How to Get Armor	How to Heal
How to Farm Callisto Credits	Ammo Farming Guide
How to Perform a Quick Kill	-
Weapons & Combat
Best Upgrades Guide	Gun Controls Guide
How to Dodge Melee Attacks	How to Block
Best Weapons Guide	Perfect Dodge Guide
System / FAQs
Difficulty Settings Guide	Best Settings Guide
New Game Plus Guide	Season Pass Price and Contents
All Permanent Events and Missable Content	List of All Death Animations/Scenes
How to Fix Stuttering and Frame Rate Issues	Can You Save the Trapped Worker?
How to Pre-Load	How to Fix Low Quality Text
How to Use Photo Mode	Is There a Map?
How to Reset Checkpoints	Contagion Mode Guide
How to Save: Can You Turn Off Autosave?	What are Beta Paths?
All Weapon Schematic Locations	Ending Explained
Can You Quick Turn?	Can You Skip Cutscenes?
List of Unlockables	-