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// item · risk of rain 2

Armor-Piercing Rounds, in depth.

Common item (white). What the game says, what it really does, what each copy adds and what it pairs with.

// what it does

What it does.

Armor-Piercing Rounds
Common item (white)

You do 20% more damage to bosses. Each extra one adds 20%.

Game text: «Deal an additional 20% damage (+20% per stack) to bosses.»

Stacking: Each copy adds the same, no cap.

Watch out: Only works on enemies with a red health bar (bosses).

// per copy

What each copy adds.

1 copy2 copies3 copies5 copies10 copies
+20%+40%+60%+100%+200%

Each copy adds the same.

// pairs with

What it pairs with.

Focus Crystal

boss damage plus close damage: the boss falls sooner.

Lost Seer's Lenses

covers the gap of the lenses, which do not kill red-bar enemies.

Acrid

more poison damage to bosses.

// who uses it best

Survivors that use it best.

Acrid

more Poison damage to bosses.

// how to get it

How to get it.

Drops from small chests, white printers and almost anything that gives items.

Needs unlocking first with the challenge «Advancement».

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// faq

FAQ.

What does Armor-Piercing Rounds do in Risk of Rain 2?

You do 20% more damage to bosses. Each extra one adds 20%.

What happens if you pick up several Armor-Piercing Rounds?

Stacking: Each copy adds the same, no cap.Watch out: Only works on enemies with a red health bar (bosses).

How do you get Armor-Piercing Rounds?

Drops from small chests, white printers and almost anything that gives items. Needs unlocking first with the challenge «Advancement».

// more items

Other items in depth.

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Items in depth · Every item by rarity

Sources: the game's English text (name and description), the Risk of Rain 2 wiki (riskofrain2.wiki.gg: this item's page, read on 31 October 2026; numbers, stacking formula and notes) and the wiki's survivor pages. The plain-words text and the synergies are ours. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).