Loot & Rewards ​

From BossRush Wiki

Overview ​

  • The BossRush Mod loot system follows different rules depending on the mode. This page details the loot mechanics for each mode.

Standard BossRush Loot ​

Random Loot Toggle ​

  • The config option enableRandomBossLoot (default: on) controls whether the BossRush random loot system is active.
  • When disabled, BossRush no longer takes over the vanilla Boss drop flow, and all quality distribution rules below do not apply.

Loot Crates ​

  • After each Boss is killed, a loot crate spawns at its death location.
  • The number of drops is determined by the Boss's health, ranging from 7 to 15 items (higher health = more drops).

Quality Distribution Modes ​

The config option useLegacyBossLootProbabilities controls the quality distribution algorithm. Default is true (Legacy Probability Mode).

  • This setting no longer affects only Standard BossRush; it also applies to the corresponding regular loot-quality paths in From Scratch / Faction War / Blood Hunt as described below.

Legacy Probability Mode (Default) ​

  • Each quality tier has an independent drop probability determined by a bonusFactor.
  • bonusFactor = 80% × health factor + 20% × kill speed factor, range [0, 1].
    • Health factor: normalized position of the Boss's max health within the Boss pool's min–max health range.
    • Speed factor: remaining ratio of kill time relative to a reference time window (faster = higher).
  • Quality probabilities scale linearly as bonusFactor goes from 0→1:
    • Quality 8: 0.05% → 0.10%
    • Quality 7: 0.10% → 1.00%
    • Quality 6: 1.00% → 5.00%
    • Quality 5: 5.00% → 10.00%
    • Quality 1-4: remaining probability split by weights 0.1345 : 0.3655 : 0.3655 : 0.1345
  • Q5+ Guarantee: when the Boss's max health > 250 and the loot crate contains no quality 5+ item, one extra Q5+ item is appended (90% Q5, 9% Q6, 0.9% Q7, 0.1% Q8).

Simplified Probability Mode ​

  • Set useLegacyBossLootProbabilities to false to switch to this mode.
  • Item quality is divided into two tiers: normal (1-4) and high quality (5-8).
  • Total high quality probability is affected by two additive factors:
    • Boss health bonus: +5% per 100 health points
    • Kill speed bonus: the faster the kill, the higher the bonus (up to +10%)
  • Internal high quality distribution: quality 5 : 6 : 7 : 8 = 4 : 3 : 2 : 1
  • No Q5+ guarantee mechanism.

Note: The main gameplay-facing differences between the two modes are the probability distribution algorithm and the Q5+ guarantee behavior. Candidate-pool filtering details can also differ between the two paths.

Completion Reward Crate ​

  • After defeating all waves, the completion reward crate no longer appears instantly by the signpost.
  • It now first shows up as a highlighted ghost crate above the player, then materializes and descends slowly before becoming a normal interactable reward crate:
  • Easy (1 Boss/wave): 3 high quality items
  • Normal (multiple Bosses/wave): 10 high quality items

Loot Blacklist ​

  • The following types of items will not appear in the loot pool:
    • Items flagged as non-droppable
    • Demo-locked items
  • Quest-tagged item handling depends on the active loot-probability path; Legacy mode applies the stricter exclusion rule
  • Crown drop weight is reduced to 0.1x, lowering its appearance frequency.

Infinite Hell Rewards ​

Per-Wave Cash ​

  • Each Boss kill grants cash = Boss max health × 10.
  • Example: a Boss with 1000 health drops 10,000 cash on kill.
  • Cash pickups within 2 meters of the player automatically fly in; outside that radius you still need to move closer.

Random High Quality Items ​

  • Every 5 waves, 1 high-quality item drops.
  • The reward pool prefers items with quality ≥ 5 and value ≥ 10,000; if no candidate meets that value threshold, it falls back to other quality ≥ 5 items.

Milestone Grand Rewards ​

  • Every 100 waves triggers a milestone reward containing Crowns and large amounts of cash, scaling exponentially:
    • Wave 100: 1 Crown + 10,000,000 cash
    • Wave 200: 2 Crowns + 20,000,000 cash
    • Wave 300: 4 Crowns + 40,000,000 cash
    • Wave 400: 8 Crowns + 80,000,000 cash
    • And so on, doubling every 100 waves.

Early Wave Protection ​

  • Early waves automatically exclude certain high-intensity Bosses to avoid encountering overpowered enemies at the start.
  • As waves progress, the Boss pool gradually unlocks all Bosses, with difficulty steadily increasing.

From Scratch Loot ​

  • Enemies carry random equipment, all of which drops in a loot crate on kill.
  • Equipment quality increases with waves: quality = 1 + (wave/5) + (enemy health/500).
  • Later enemies may drop equipment better than what you currently have.
  • When useLegacyBossLootProbabilities = true, From Scratch uses the Legacy Probability Mode for the quality distribution of enemy backpack bonus items, backpack refill items, and extra backpack ammo stacks.
  • This toggle does not change drop counts, equipped weapons, melee weapons, equipped gear, or the ammo currently loaded for combat.

Faction War Loot ​

  • Killing an enemy faction's Boss drops a loot crate.
  • Killing a same-faction Boss does not drop a loot crate.
  • Dragon Descendant and BEAR faction promoted minions carry random equipment.
  • When useLegacyBossLootProbabilities = true, regular on-death backpack loot in Faction War also switches to the Legacy Probability Mode.
  • The toggle only affects backpack bonus items / backpack refill items / extra backpack ammo stacks, not the enemy's live combat loadout.

Blood Hunt Loot ​

  • When useLegacyBossLootProbabilities = true, regular on-death backpack loot in Blood Hunt also switches to the Legacy Probability Mode.
  • This only affects regular backpack loot quality. It does not affect drop counts, bounty bonus drops, extraction rewards, or any other shared high-quality reward-pool payouts.
  • Killing a bounty Boss drops extra items from the shared high-quality reward pool, with the quantity equal to the number of Bounty Marks on that Boss.
  • Upon successful extraction, each Bounty Mark on a player = 1 item from the shared high-quality reward pool, sent to the Storage Point.
  • Both reward sources currently reuse the same shared reward-pool rules.

Custom Boss Exclusive Drops ​

Killing a custom Boss drops exclusive equipment on top of the regular loot crate. The two dragons work differently from the Witch - read this before planning a farm route:

Dragon Descendant - one of three ​

Each kill drops exactly one piece, weighted across three. The numbers add up to 100%:

  • Flame Scale Armor (Armor): 60%
  • Crimson Dragon Helm (Helmet): 30%
  • Dragon Breath (Firearm): 10%

So you are guaranteed one piece, but collecting all three takes several kills, and Dragon Breath in particular is down to luck.

Skyburner Dragon Lord - one of six ​

Again exactly one piece, weighted across six:

  • Reverse Scale (Totem): 39%
  • Cloud Rider (Totem): 15%
  • Dragon King Crown (Helmet): 15%
  • Dragon King Scale Armor (Armor): 15%
  • Skyburner Halberd (Melee): 15%
  • Dragon Cannon (Firearm): 1%

That 1% on the Dragon Cannon means roughly 100 Dragon Lord kills on expectation. It is the hardest item in the Mod to obtain - go in knowing that.

Phantom Witch - an independent extra ​

The Witch works the other way: Soulreaper's Requiem is an independent extra roll at 50%, appended to the loot crate without competing with anything else. Frostmourne's drop from the vanilla "???" Boss uses the same independent-extra mechanism.

Every Boss also drops these ​

The above covers loot crates and exclusive gear. On top of that, any Boss you kill runs the rolls below. They're independent of each other and never take away anything you'd otherwise get.

Relic Souls (guaranteed) ​

Every Boss kill grants souls: Boss max health / 15, rounded, minimum 1. Tankier Bosses pay more. Souls exist only to condense eggs: bank 240 in one bloodline and you can condense that Boss's egg on demand.

Relic Eggs (about 4%) ​

A small chance to drop an egg of the matching bloodline outright. This is the lucky line; condensing is the guaranteed line - two parallel paths, so unlucky players can still complete the collection.

Affix Forge Stones (about 8%) ​

Material for affix forging, roughly one per standard arena run. The steady alternative is Dingdang's shop (affinity Lv.2, up to 5 per restock).

Where eggs and stones actually land ​

Both follow that Boss's normal loot path - they are not always left on the corpse:

  • Standard BossRush, From Scratch - into the BossRush loot crate, alongside everything else
  • Infinite Hell - this mode spawns no crate at all, so eggs and stones drop on the ground; check where the Boss fell
  • Faction War, Blood Hunt - no mod crate here, so the item stays on the Boss - search the body

One-line rule: if there's a crate, look in the crate; if there isn't, look at the ground; only then search the body.

Backyard Seeds (about 25%, the three custom Bosses only) ​

Requires delivering Duck King Campaign chapter 1 to unlock the garden. After that, the three custom Bosses' loot crates each carry an extra seed:

  • Dragon Descendant -> Dragon Seed (grows Dragon Breath Fruit)
  • Skyburner Dragon Lord -> Skyburner Ember Seed (grows Emberheart Chili)
  • Phantom Witch -> Phantom Spore (grows Shadow Mushroom)

The seed is free - it never displaces the Dragon set or Dragon Lord exclusive drops you'd otherwise get.

So a full Skyburner Dragon Lord kill pays out: one loot crate + one piece of exclusive gear from the six + a pile of souls + a 4% egg + an 8% forge stone + a 25% ember seed. Don't just watch the gear slot.