Mystery Boss

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Sandbox Only Content

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Mystery Boss was previously removed on the 5th of June 2026, though it has been made available through the Sandbox mode later.
It is not accessible anywhere else in the game. This page will attempt to include information about both the version before removal and its re-added version.

Similar Article

This article is about Mystery Boss. You may be looking for other Mystery enemies.

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 <title source="title1"><default>Mystery Boss</default></title>

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CurrentTranslatedApril Fools 2022Version 1

File:Quote.png

"A fast, hidden, or tanky threat? What could it be?
Prepare for the worst, anything can go wrong now..."

―Commander dialogue on Wave 32 (Legacy Molten)
Commander dialogue on Wave 23 (Formerly Normal)

File:Quote.png

"Incoming new mysterious enemy!"

―Beginning of Wave 29 (Golden)

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"This doesn't look like your normal mystery...
These Mystery bosses will summon in OTHER bosses!"

―Commander dialogue on Wave 32 (Legacy Fallen)
Commander dialogue on Wave 32 (Nuclear)

File:Quote.png

"This isn't your average mystery enemy.."

―Commander dialogue on Wave 33 (Hardcore)

File:Quote.png

"An immediate, hidden or immediate threat? who
Prepare for the worst, something can go wrong..."

―Commander dialogue on Wave 32 (Translated Molten)
Commander dialogue on Wave 23 (Formerly Translated Normal)

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"It will not be a secret ...
The government has high hopes."

―Commander dialogue on Wave 32 (Translated Fallen)

File:Quote.png

"A fast, hidden, ow tanky threat? What couwd it be?
Pwepawe fow the wowst, anything can go wwong now... ☀(▀U ▀-͠ )"

―Commander dialogue on Wave 23 (April Fools 2022 Normal)
Commander dialogue on Wave 32 (April Fools 2022 Molten)

File:Quote.png

"This doesn't wook wike youw nowmaw mystewy...
These Mystewy bosses wiww summon OTHEW bosses! (๑•̀ㅂ•́)૭☒"

―Commander dialogue on Wave 32 (April Fools 2022 Fallen)

File:Quote.png

"This isn't youw avewage mystewy enemy.. (ΦωΦ) "

―Commander dialogue on Wave 33 (April Fools 2022 Hardcore)

File:Quote.png

"Incoming new mysterious enemy!"

―Beginning of Wave 23 (Pre-Overhaul, Beginner's)
Beginning of Wave 32 (Pre-Overhaul, Molten & Fallen)
Beginning of Wave 29 (Pre-Overhaul, Golden)

Description

The Mystery Boss is an enemy that will spawn a random enemy upon its death. The enemy spawned depends on the mode and wave. As the name implies, the Mystery Boss mostly spawns bosses that have high health or enemies that are quick, meaning that it is a very dangerous enemy. Its health depends on the mode you are playing on.

The Mystery Boss appears in the Sandbox exclusive Legacy Molten, Legacy Fallen and Golden modes.

The Mystery Boss is spawned by the Mystery Summoner, Summoner Boss, Necromancer Boss and Void Reaver. The Grave Digger used to be able to summon it in the Easy mode. If a map has the Enemies Beta modifier active, it is not spawned by these enemies as they spawn the Breaker4 instead.

The Mystery Boss is replaced by the Breaker4 in any map with the Enemies Beta modifier active.

Appearance

The Mystery Boss is a large translucent humanoid with a glowing orange question mark on its torso. All of its body parts are colored indigo and are made of a glass material. Its left leg is twisted and its head is pointing slightly downwards as it walks. It is also faceless.

Enemies Spawned

The Mystery Boss is able to spawn more enemies after its debut. Italic names can be spawned from the Mystery Boss's debut.

Easy

Only visible through Sandbox mode.

• Normal Boss
• Necromancer (from wave 23)
• Slow Boss (from wave 17)
• Hidden Boss (from wave 18)
• Speedy Boss (from wave 21)

Legacy Molten

• Normal Boss
• Necromancer (from wave 20)
• Slow Boss (from wave 23)
• Hidden Boss (from wave 25)
• Speedy Boss (from wave 31)
• Molten Titan (from wave 38)

Golden

• Abnormal Boss
• Dark Necromancer (from wave 20)
• Chained Boss (from wave 23)
• Shadow Boss (from wave 25)
• Boomer (from wave 35)
• 24 Karat (from wave 38)

Legacy Fallen

• Abnormal Boss
• Dark Necromancer (from wave 20)
• Giant Boss (from wave 23)
• Shadow Boss (from wave 25)
• Boomer (from wave 35)
• Fallen Hero (from wave 38)

Strategy

• High DPS towers are recommended, supported by the DJ Booth and Commander.
• The Mystery Boss' random nature is not as impactful as the Mystery's. However, some enemies still pose a significant threat without the right towers.
  • An overflow of Fallen Heroes, 24 Karats or Molten Titans may be overwhelming with their massive combined health.
    • In general, high DPS towers accompanied by support towers is the best answer against all high health enemies.
  • Shadow Bosses may be dangerous without adequate hidden defense.
    • Hidden defense should be strong. Most high DPS towers have hidden detection, so Shadow Bosses should not be a major issue with them.
• As Mystery Bosses and their spawns come in hordes, towers that can deal damage to multiple enemies like the Mortar, Rocketeer, Gladiator and Executioner are effective.
  • However, some of these towers may not fare so well against high health enemies. High DPS towers should be used to counter those.
• Be aware that you do not earn any cash from damaging enemies that the Mystery Boss spawns in every mode.
• The enemies that spawn from the Mystery Boss do not need to be killed for wave progression to occur.
  • If you are speedrunning a map, you should focus on killing the Mystery Bosses first by setting your towers' targeting to Weakest before moving onto the enemies that spawn.
    • Be aware that the spawned enemies may outrun your towers if you switch target settings.
      • Using towers that can damage multiple enemies can remedy this.
• The Sledger, Frost Blaster and Electroshocker are probably the best slowing towers against Mystery Bosses as they can hit multiple enemies at once, though others like the Toxic Gunner are still viable.
  • Be aware of the enemies' size and immunities, which may cause some of these towers to be less effective.
• Some enemies from the Mystery Boss like the Giant Boss have defense, so defense dropping towers can be useful.

Gallery

Previous Variants

• Error creating thumbnail: File missing
  First version, first animation (26 May 2020 – 29 October 2020)

Corpse Variants

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  Second Corpse variant, current version (12 March 2025 – Present)

Promotional Images

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  Mystery Boss on a promotional image.
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  Mystery Boss on a promotional image.

Promotional Videos

• Mystery Boss on a promotional video.
  Mystery Boss on a promotional video.

Miscellaneous

• Error creating thumbnail: File missing
  Mystery Boss on its Index icon.

Trivia

• There was a glitch whereby the Mystery Boss, after its death, could go to the next turn and stop there with its walking animation still playing. This was just a visual bug and did not affect gameplay in any way.
• For some reason, the Mystery Boss debuts on wave 29 for Golden mode.
  • However, the text associated with the Mystery Boss appeared on wave 32, like Molten and Fallen modes.
  • The same thing occurs with the Fallen Hero, Molten Titan, 24 Karat and Super Toxic which all can be spawned on wave 38 from the Mystery Boss, which is before their debut on wave 39 on Fallen, Molten, Golden modes and, formerly, Polluted Wasteland II, respectively. However, this is intentional.
• Prior to the Entity System Update, summoned enemies from the Mystery Boss used to say "Mystery's ______" instead of "Mystery Boss's ______".
• The question mark on the Mystery Boss is a re-textured version of the Question Mark accessory from the Roblox catalog.
• Prior to the Entity System Update, Mystery Bosses summoned by the Summoner Boss could be stuck in the air.

Update History

• 26 May 2020 - Release v1.11.0
  • Mystery Boss added, replacing the Super Mystery and Uber Mystery.
    • Enemies inherited from the Super Mystery: Normal Boss, Necromancer, Slow Boss and Hidden Boss.
    • Enemies inherited from the Uber Mystery: Dark Necromancer, Speedy Boss, Abnormal Boss (Wasted Boss in Polluted Wasteland), Shadow Boss, Chained Boss and Giant Boss (Amalgamation in Polluted Wasteland).
    • New enemies it spawns: Molten Titan, Boomer (Splitter in Polluted Wasteland), 24 Karat and Fallen Hero.
  • Bug: Mystery Boss upon death has a chance to not disappear, instead it will have negative health and continue walking, stopping when it reaches a turn.
• 31 May 2020 - Release v1.11.1
  • Bugfix: Negative health bug made less severe.
• 29 October 2020 - Overhaul v1.0.0
  • Health decreased from 100 to 75 in Molten mode.
  • Now becomes immune to all forms of damage when summoned by the Necromancer Boss.
  • New enemies it spawns (Hardcore mode): Lead Boss, Mega Slow, Slow King, Speedy King and Soul Boss.
  • Summoned enemies no longer give money when damaged.
  • Animation changed.
  • No longer appears in Golden mode as it has been removed.
  • Bugfix: Negative health bug fixed.
• 12 March 2022 - v1.1.0
  • Summoned enemies from the Mystery Boss now says "Mystery Boss's______" instead of "Mystery's______".
  • Bug: Mystery Boss has 80 health on all gamemodes.
• 15 March 2022 - v1.1.0c
  • Bugfix: Mystery Boss now has correct health values on all gamemodes.
• 29 July 2022 - v1.3.0
  • Now appears in Polluted Wasteland II
  • Enemies it spawns changed.
    • New enemies it spawns:
      • Polluted Wasteland II: Mutated Boss, Necromancer, Amalgamation, Slime and Super Toxic.
• 31 October 2022 - v1.4.2
  • No longer appears in Polluted Wasteland II, as it has been replaced by the Breaker4.
• 24 February 2024 - v1.14.0
  • No longer appears naturally in Easy mode.
• 2 August 2024 - v1.27.0
  • No longer appears in Fallen mode.
• 11 December 2024 - v1.45.0
  • No longer appears in Molten mode, as it has been replaced by the Breaker4.
• 16 December 2024 - v1.46.0
  • Now appears in Polluted Wasteland II, replacing the Breaker4.
  • Bug: No longer summons anything.
• 17 December 2024 - v1.46.4
  • Mystery Boss now appears in Golden mode, Legacy Fallen mode and Legacy Molten mode, if activated through Sandbox mode.
• 17 December 2024 - v1.46.5
  • Mystery Boss no longer appears in Golden mode, Legacy Fallen mode and Legacy Molten mode, as they have been removed.
• 12 February 2025 - v1.53.0
  • Mystery Boss now appears in Golden mode, Legacy Fallen mode and Legacy Molten mode, if activated through Sandbox mode.
  • No longer summons Chained Boss in Golden mode.
  • Bugfix: Now summons enemies.
• 19 February 2025 - v1.54.0
  • No longer appears in Polluted Wastelands II as it has been replaced by the Breaker4.
• 30 April 2025 - v1.63.0
  • Bug: Mystery Boss no longer uses the death sound effect.
• 24 September 2025 - v1.75.0
  • No longer appears in public rotation of Challenge Maps.
• 5 June 2026 - v2.0.0
  • Mystery Boss removed from the main game, as it has been replaced by Elite Mystery. Now appears exclusively in Sandbox mode.
  • Bug: Mystery Boss model does not load in the Index.

Error creating thumbnail: File missing Legacy Molten
Previous Debut	Current Debut	Next Debut
Speedy Boss Wave 30	Mystery Boss Wave 32	Mystery Summoner Wave 36

Error creating thumbnail: File missing Golden
Previous Debut	Current Debut	Next Debut
Charge Wave 26	Mystery Boss Wave 29	Tank Wave 30

Error creating thumbnail: File missing Legacy Fallen
Previous Debut	Current Debut	Next Debut
Tank Wave 30	Mystery Boss Wave 32	Boomer Wave 34

Error creating thumbnail: File missing Fallen (Polluted Wasteland)
Previous Debut	Current Debut	Next Debut
Tank Wave 30	Mystery Boss Wave 32	Splitter Wave 34

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