Upgrades

There are a number of upgrades which can be purchased from merchants throughout the game. These upgrades usually require Gear Parts and Advanced Gear Parts, which are limited and found in treasure chests.

Capacity Upgrades

Capacity upgrades increase the storage space in the player inventory for items and ammo.

Backpack

Backpack Expansions - Allow you to carry more items in your backpack. Backpack capacity expansions don't require Gear Parts.

Icon Name Description Upgrade Cost Upgrade Effect
Backpack Expansion Allows you to carry more items in your backpack.   Salt (50) Upgrades to 3 backpack slots
  Salt (100) Upgrades to 4 backpack slots
  Salt (150) Upgrades to 5 backpack slots
  Salt (200) Upgrades to 6 backpack slots
  Salt (250) Upgrades to 7 backpack slots
  Salt (300) Upgrades to 8 backpack slots
  Salt (350) Upgrades to 9 backpack slots
  Salt (400) Upgrades to 10 backpack slots

Bomb Box

Bomb Box Expansions - Allow you to carry more bombs.

Icon Name Description Upgrade Cost Upgrade Effect
Bomb Box Expansion Allows you to carry more bombs.   Salt (25)
  Gear Part (3)
Increases Bomb Box storage to 15.
  Salt (50)
  Advanced Gear Part (3)
Increases Bomb Box storage to 20.

Ammo Box

Ammo Box Expansions - Allows you to carry more ammo.

Icon Name Description Upgrade Cost Upgrade Effect
Ammo Box Expansion Allows you to carry more ammo.   Salt (25)
  Gear Part (3)
Increases Ammo Box storage
  Salt (50)
  Advanced Gear Part (3)
Increases Bomb Box storage to 60.

Weapon Upgrades

Weapon upgrades upgrade the power and damage of bombs and weapons. Like capacity upgrades they often require Gear Parts - except the Frying Pan's upgrades, which are based on story progress.

Bomb Upgrade

Bomb Upgrades - upgrades for bombs.

Icon Name Description Upgrade Cost Upgrade Effect
Bomb Upgrade An upgrade for the bombs.   Salt (50)
  Gear Part (3)
Upgrades bombs to level 2, increasing power.
  Salt (100)
  Advanced Gear Part (3)
Upgrades bombs to level 3, increasing power.

Gun Upgrade

Gun Upgrades - upgrades for the Bang-Bang Gun.

Icon Name Description Upgrade Cost Upgrade Effect
Gun Upgrade An upgrade for the Bang-Bang Gun.   Salt (50)
  Gear Part (3)
Upgrades the Bang-Bang Gun to level 2, increasing power and changing the weapon's appearance.
  Salt (100)
  Advanced Gear Part (3)
Upgrades the Bang-Bang Gun to level 3, increasing power and changing the weapon's appearance.

Flame Upgrade

Flame Upgrades - upgrades for the Scepter of Flame.

Icon Name Description Upgrade Cost Upgrade Effect
Flame Upgrade An upgrade for the Scepter of Flame.   Salt (50)
  Gear Part (3)
Upgrades the Scepter of Flame to level 2, increasing power and changing the weapon's appearance.
  Salt (100)
  Advanced Gear Part (3)
Upgrades the Scepter of Flame to level 3, increasing power and changing the weapon's appearance.

Cog Upgrade

Cog Upgrades - upgrades for the Cog Shooter.

Icon Name Description Upgrade Cost Upgrade Effect
Cog Upgrade An upgrade for the Cog Shooter.   Salt (50)
  Gear Part (3)
Upgrades the Cog Shooter to level 2, increasing power and changing the weapon's appearance.
  Salt (100)
  Advanced Gear Part (3)
Upgrades the Cog Shooter to level 3, increasing power and changing the weapon's appearance.

Pan Upgrades

The frying pan is upgrades when the player passes certain milestones in the story.

After being upgraded the pan appearance changes as both a held weapon and in the cooking mini-game window.

Icon Name Description
Level 1 This is the initial pan John begins the game with. After breaking his pan fighting slugs Mason upgrades the pan, enabling it to use a charged attack
Level 2 After impressing Lee with cooking, he leaves a new pan as a gift for John with Alva
Level 3 The pan is upgraded to maximum level by the members of the Rocket Knight Legion just before entering the Eternal Tower

Achievements

There are three achievements related to upgrades, which require the player upgrade their backpack and bombs/ammo to max capacity, as well as upgrading all weapons to max power.

Icon Name Description Missable Notes
  Prepared for Anything Upgrade your bomb and ammo boxes to their maximum capacities. Missable Purchase capacity upgrades from merchants for the bomb and ammo boxes. This requires Gear Parts and Advanced Gear Parts - to unlock this and all weapon upgrades all of these resources in game must be found in treasure chests.
  Monster Pack Upgrade your backpack to its maximum capacity. Missable Purchase capacity upgrades from merchants. Upgrades are available for salt from merchants through the story, and if missed they can be purchased from later merchants.
  Armed to the Teeth Upgrade all weapons to their max levels. Missable Purchase weapon upgrades from merchants for the Cog Shooter, Specter of Flame, and Bang Bang Gun. The Frying pan upgrades are unlocked through the story and can't be missed. Purchasing upgrades requires Gear Parts and Advanced Gear Parts - to unlock this and all weapon capacity upgrades all of these resources in game must be found in treasure chests.