Booster Pack Heroes unlock packs by beating chapter bosses

To unlock new booster packs in Booster Pack Heroes, defeat each chapter's boss — the official Steam page states that beating a chapter's boss unlocks new booster packs, heroes, spells, and challenges. Once a pack type is unlocked, you buy it in the shop between rounds with coins, then rip it open for heroes and spells. One caveat before you start: as of 2026-11-08 the official Steam page lists a planned release of November 10, 2026, so the details below come from the official page and from first-hand demo playthroughs, and the full release may tune the numbers.

How the pack loop works

Booster Pack Heroes is an incremental tower-defense game where packs are your main progression driver. Each round follows the same rhythm, and unlocking packs sits right in the middle of it:

1. Survive a wave

   Monsters attack your tower. Click enemies to damage them and let your unlocked heroes do the rest. Every run, win or lose, earns Mastery points.

2. Spend Mastery on upgrades

   Between rounds, spend Mastery on upgrades for your heroes, spells, cursor, and tower. Stronger units survive longer, which earns more Mastery.

3. Buy packs in the shop

   Coins buy booster packs from the shop. Each pack type has its own pool of heroes and spells, with rares and foil versions possible.

4. Defeat the chapter boss

   Each chapter ends with a boss. Beating it unlocks the next booster pack type plus new heroes, spells, and challenges.

5. Repeat in the next chapter

   The newly unlocked pack type appears in the shop, and every run feeds the next one with more Mastery and more power.

What unlocks which pack

The official page confirms the rule — chapter bosses unlock packs — but the exact pack order and names come from a first-hand playthrough by the Backlog Bureau channel on YouTube, played on the demo build:

The playthrough also shows pack boxes: upgrade purchasable boxes such as the basic pack box and the advanced pack box, each containing several packs at once. In that run, the basic pack box contained three basic packs, and the player noted that buying the box also grants the individual Mastery from each pack inside. Whether these boxes appear at fixed points or as shop rolls may vary — the player described them as things that unlock during progression, and one Steam reviewer complained that a box of cards can simply not show up in a run.

A worked route from the first chapter

Here is the actual route the demo playthrough took, condensed, so you know what a successful unlock path looks like:

• Round 1: click enemies to kill them; the run ends quickly but awards 13 Mastery. Buy one pack and some tower resistance.
• Open basic packs for starting units — the run pulled a Squire first. Even failed runs earn Mastery (21 on the second attempt), so nothing is wasted.
• Keep pumping Mastery into Squire upgrades, buy two more packs, and chase quests such as "open seven basic packs" and "defeat 50 goblins" for extra rewards.
• Grab the upgrade that grants a basic pack every 15 seconds and the pack box containing three basic packs; the player found opening packs from the box better because of the per-pack Mastery.
• Build toward the ogre fight with reinforcements, area upgrades, and thunderstorm support. The ogre took 10 tries in that run.
• On victory, the results screen granted the Advanced Pack, new upgrades appeared, and the monk became the new headline unit from that pool.

The second chapter followed the same shape — advanced packs, paladins, fire mages, and a werewolf boss that fell after 8 tries, awarding the Magic Pack. Expect roughly this pace, though your attempt counts will differ.

Prerequisites to check before chasing a new pack

• Coins for shop purchases — packs are bought, so make sure income upgrades are rolling.
• Mastery income — boss fights need meaningful upgrade investment; the ogre run failed repeatedly until the player bought reinforcements and damage upgrades.
• A running pack supply — the "one basic pack every 15 seconds" upgrade keeps cards flowing while you save for boss attempts.
• Current chapter reached — the pack for chapter N only matters once you fight its boss.

When a pack doesn't appear

A Steam community user named Miathan reported on October 28 that after unlocking the final pack by beating the final boss, it did not show up in the shop. That report is from the demo period and is not an officially confirmed bug, but if a freshly unlocked pack is missing from your shop, try starting a new round first, since shop stock refreshes between rounds. If it still never appears, checking the Steam community hub for similar reports is the fastest way to see whether others hit the same thing after launch.

Demo differences to keep in mind

The unlock rule itself comes from the official page, so it should hold in the full game. Two demo-era quirks may change at launch:

• The Next Fest demo update of October 19 added Interlopers: opening any pack has a super-rare chance to drop a random hero from one of the packs included in the full game. That cross-pool leak is a demo feature, so don't count on it after November 10 unless the developers say otherwise.
• The September 18 demo update added a new resource used to unlock shop upgrades, a revamped shop, and foil versions of heroes and tomes — shop behavior in your build may differ from older videos.

Next steps

• Read about Mastery spending once you have packs unlocked, since boss attempts hinge on upgrade choices.
• Check the pack pools guide to see which heroes and spells each pack can contain before deciding what to buy.

FAQ

How do you unlock new booster packs in Booster Pack Heroes?

Defeat each chapter's boss — the official Steam page states that beating a chapter's boss unlocks new booster packs, heroes, spells, and challenges. Demo playthroughs show the Advanced Pack coming from the ogre and a Magic Pack from the werewolf.

Do you buy packs or unlock them?

Both. Unlocking a pack type makes it available, but you then purchase individual packs in the shop with coins between rounds. Pack boxes containing several packs can also appear as upgrades.

What unlocks the Advanced Pack?

In a first-hand demo playthrough, defeating the ogre — the first chapter's boss — completed the chapter and awarded the Advanced Pack, which added monks and paladins to the pool.

Can a pack give me heroes from other packs?

In the Next Fest demo, yes: any pack has a super-rare chance to drop an Interloper, a random hero from a pack included in the full game. The developers described this as a demo feature, so it may not apply after launch.

Check note: this page is based on the official Steam store page, the Steam community hub, and two first-hand YouTube playthroughs (gameplay run, official trailer). The boss-unlock rule is official; the specific pack names and unlock order come from one demo playthrough and remain unconfirmed for the full release.