Bullet Upgrades

The Bullet Upgrades are a collection of bullet-themed passive items that provide bonuses to the bullets that the player's guns fire.

Below is a list of all of the bullet upgrades that the player can find.

D Tier
Battery Bullets, which improve accuracy, provide immunity to electricity and allows bullets to electrify water. The Robot starts with this bullet upgrade.

C Tier
+1 Bullets, which provide a 25% damage bonus to bullets; Angry Bullets, which cause bullets to re-fire themselves into nearby enemies, or in random directions; Bouncy Bullets, which allow bullets to bounce off of walls and enemies; Cursed Bullets, which increase the player's damage as they obtain more curse; Easy Reload Bullets, which allow the player to automatically reload a single bullet when dodge rolling; Flak Bullets, which cause bullets to splinter off into smaller bullets upon hitting walls or enemies; Ghost Bullets, which allow bullets to pierce enemies; Heavy Bullets, which increase damage and knock-back at the cost of bullet velocity; Katana Bullets, which, upon killing an enemy, gives a chance to trigger a flurry of wind slashes that damage and push other enemies; Remote Bullets, which allow the player to control the flight path of bullets using the cross-hair and slightly increases damage; Silver Bullets, which massively increases the damage the player deals against Jammed enemies and moderately increases the damage done to bosses; Zombie Bullets, which provide a chance for missed shots to refund ammo.

B Tier
Bloody 9mm, which provides a chance of a bullet being replaced with one that bounces off walls and homes towards and pierces through enemies; Bumbullets, which provide a chance for angry bees to be fired out of the player's gun alongside a bullet; Chance Bullets, which sometimes shoots bullets from the player's other held guns while firing a gun; Charming Rounds, which provide bullets a chance to charm enemies; Devolver Rounds, which provide a small chance for bullets to devolve enemies into Arrowkin, similarly to the Devolver; Gilded Bullets, which increase damage depending on how wealthy the player is; Helix Bullets, which doubles gun output but slightly reduces damage and causes bullets to travel in helical patterns; Homing Bullets, which provide bullets a chance to home in on enemies; Hot Lead, which causes some bullets to set enemies on fire; Irradiated Lead, which causes some bullets to poison enemies; Magic Bullets, which provide a small chance for bullets to transmogrify enemies into chickens; Rocket-Powered Bullets, which increase the velocity of bullets, and slightly increases damage and fire rate; Scattershot, which triples gun output at the cost of accuracy and damage; Shadow Bullets, which provide a chance to fire an additional bullet for free whenever the player fires a bullet; Stout Bullets, which significantly increase damage and bullet size at close range but decrease damage at longer ranges.

A Tier
Alpha Bullets, which significantly increases the damage of the first bullet in the magazine; Chaos Bullets, which cause bullets to do random things; Explosive Rounds, which provide a small chance for bullets to explode on impact; Fat Bullets, which increase the size and damage of bullets while slightly reducing max ammo capacity; Frost Bullets, which provide a chance for bullets to slow and eventually freeze enemies; Hungry Bullets, which provide a chance for bullets to become cannibalistic and destroy enemy bullets on contact; Omega Bullets, which double the damage of the last bullet in the magazine; Orbital Bullets, which cause missed bullets to temporarily orbit around the player; Shock Rounds, which link all of the player's bullets together with lightning; Snowballets, which cause bullets to increase in size and damage as they travel; Vorpal Bullets, which give each bullet a small chance to deal massive damage, similarly to the Vorpal Gun.

S Tier
Blank Bullets, which give all bullets a chance to generate a short-ranged blank on impact; Platinum Bullets, which slightly increase damage and fire rate for each bullet landed on enemies, up to a maximum of triple damage and fire rate.

Trivia

 * Most Bullet Upgrade sprites are designed after either pistol cartridges or shotgun shells, the exceptions being Silver Bullets and Chaos Bullets, which are designed after rifle cartridges.