Backpack

⭐ RARITY: Unconfirmed

Effect: +1 Projectile Count for all weapons.

🔎Rarity Notice

Source conflict: some sources list Uncommon, while others list Rare. In-game UI color takes precedence. This page treats rarity as unconfirmed until clarified by official patch notes.

Unlock

Unlocked by default

Overview

Backpack is a straightforward power spike: it adds one extra projectile to every weapon you fire. If you are new to Megabonk, start here—this page compiles verified facts and safe tips. Early on, you can also browse the full Items index for more unlocks.

🔓 How to Unlock

Status: ✅ Unlocked by default. No quest or prerequisite is required.

ℹ️Why you see it early

Backpack belongs to the group of items that can appear from the start of a new profile. If you don’t see it in a run, that’s just RNG—keep opening chests and leveling.

🧪 How Backpack Works

Applies globally: the +1 projectile affects all weapons you use.
Scales multiplicatively with multi-shot patterns: weapons that already fire several projectiles gain the most practical DPS from one more shot.
Stacks with other sources of Projectile Count: e.g., tomes or build-specific effects that increase projectile numbers.

Advantages

Immediate clear-speed boost with zero downsides.
Strong on multi-projectile or shotgun-style weapons.
Useful in any build; no special conditions needed.

Trade-offs

No defensive value; you still need survivability elsewhere.
Less impact on single-target beams/auras that don’t use projectiles.

🔗 Best Synergies & Example Weapons

Backpack shines on weapons that scale with projectile count. Popular picks include:

Firestaff

Multi-projectile patterns benefit directly from +1 projectile.

Firestaff details →

Bananarang

Extra boomerangs = more hits per cycle and better crowd clear.

Bananarang details →

Quantity Tome

Another source of projectile count. Combine for dense bullet patterns.

Quantity Tome →

⚠️Notes on edge cases

Some non-projectile weapons (e.g., persistent auras) may not gain value from projectile count. When in doubt, test on a training wave and adjust your build.

❓ Frequently Asked Questions

Is Backpack unlocked by default?

Yes. Multiple guides confirm it appears in the starting item pool without any quest requirement.

Does Backpack affect all weapons?

Yes—Backpack adds +1 projectile universally. For weapons that don’t use projectiles (like some auras), the benefit can be negligible.

What is Backpack’s rarity?

Unconfirmed. Sources conflict between Uncommon and Rare. Check in-game UI colors on your current version.

Turn Backpack into a Run-Winner

Pair it with multi-projectile weapons and XP-friendly maps to snowball fast.

Explore Builds Items Tier List