Puzzle Lab


 * ''"A LOT of SCIENCE happens at Boom Labs, and that means that there are dozens and dozens of unfinished or abandoned experiments hidden away in the complex. It’s a golden opportunity for a certain clever someone to figure out what the heck went wrong! Can you unravel their mysteries without exploding, dissolving, or becoming irrevocably poultry-ized forever?
 * When you experience The Boomsday Project’s free single-player content, The Puzzle Lab, you’ll discover that science is fun! And dangerous! Not necessarily in that order!"

The Puzzle Lab is a free single-player game mode added with the The Boomsday Project expansion. The mode became available on August 21, 2018, two weeks after the release of the expansion.

The Puzzle Lab is categorized into various puzzles that the player will have to solve:
 * Lethal: Destroy the enemy hero in a single turn.
 * Mirror: Create a board state in which both sides are perfect mirrors of one another, including minion positioning, attributes, etc.
 * Board Clear: Clear the battlefield of all minions.
 * Survival: Survive the enemy's Hero Power (by healing to full, plus some Armor in higher difficulties).

Lethal
Lethal puzzle set #1 with 9 puzzles.
 * Poisonmaster Pollark

Lethal puzzle set #2 with 7 puzzles.
 * Myra Rotspring

Lethal puzzle set #3 with 7 puzzles.
 * Lil' Stormy

Lethal puzzle set #4 with 6 puzzles.
 * Electra Stormsurge

Mirror
Mirror puzzle set #1 with 8 puzzles.
 * Test Subject #362

Mirror puzzle set #2 with 7 puzzles.
 * Astromancer Arwyn

Mirror puzzle set #3 with 6 puzzles.
 * Stargazer Luna

Mirror puzzle set #4 with 5 puzzles.
 * Zerek, Master Cloner

Board Clear
Board Clear puzzle set #1 with 8 puzzles.
 * Dexter the Dendrologist

Board Clear puzzle set #2 with 7 puzzles.
 * Flobbidinous Floop

Board Clear puzzle set #3 with 5 puzzles.
 * Demonologist Draan

Board Clear puzzle set #4 with 5 puzzles.
 * Dr. Morrigan

Survival
Survival puzzle set #1 with 8 puzzles.
 * Boomnician Breena

Survival puzzle set #2 with 6 puzzles.
 * Boommaster Flark

Survival puzzle set #3 with 6 puzzles.
 * Glow-Tron 2000

Survival puzzle set #4 with 5 puzzles.
 * Crystalsmith Kangor

The Secret Lab
These final puzzles are unlocked by completing their previous respective puzzle sets.

Blast Dr. Boom
There are 4 final lethal puzzles.

Mirror Dr. Boom
There are 4 final mirror puzzles.

Clear Dr. Boom
There are 4 final board clear puzzles.

Survive Dr. Boom
There are 6 final survival puzzles.

Tips

 * For all loading screen tips for Puzzle Lab, see Tips.

Like Dr. Boom says, visualizing the endgame of a puzzle and working the puzzle backwards is a good idea towards solving these puzzles in general.


 * It's good to plan ahead. Me? I plan behind. Results are guaranteed.

The titles of some of the puzzles are also a hint to how the puzzle is solved.

Trivia

 * The hardest puzzle by far that most streamers on Twitch struggled with was the last board clear puzzle (the "Defile" puzzle).
 * From March 26 to May 12, 2020, Astromancer Arwyn's Mirror Puzzle #6 (Divine Alignment) and Dr. Boom's Lethal Puzzle #4 (Full Northshire) were impossible to complete due to card changes with Holy Smite and Power Word: Shield caused by the priest rework patch on March 26. The priest rework also affected priest cards in many other puzzles, but those puzzles were still solvable, including Test Subject #362's Mirror Puzzle #8 (Three Odd Yetis) and Dr. Boom's Lethal Puzzle #3 (Never Go Full Northshire). A hotfix to correct this problem was originally slated for April 9. However, due to many unforeseen issues, the fix for Puzzle Labs was delayed until May 12, 2020.
 * The fix on May 12 made different versions of the changed Priest cards available in the various puzzles. For example, in Dr. Boom's Lethal Puzzle #3 (Never Go Full Northshire), Power Word: Shield was changed to cost 0 mana and to draw a card. For example, Holy Smite appeared in two different versions, one dealing 2 damage to a minion, and another dealing 3 damage to a minion.

Patch changes

 * Fixed a bug where some Boomsday puzzles were causing desync issues.
 * Fixed solvability issues caused by the Priest rework that occurred on March 26, 2020.
 * Added, fully released two weeks after the patch.