Boss Challenge

Boss Challenge is a game mode in Bloons TD 6 involving Boss Bloons introduced in version 40.0. In this mode, players can challenge Bloonarius, Lych, Vortex, Dreadbloon, Phayze, or Blastapopoulos on any map of their choice. This mode features no rewards, but can be played for the challenge alone, to improve the player's own scores or can be used as practice for Boss Bloon Events.

Players can access this mode by going into the Events page and clicking on the corresponding button in the lower left part of the screen.

Mechanics

Ruleset

Players can choose any of the Boss Bloons, the featured and Map for the challenge, the game mode is always set to Medium difficulty with almost standard rounds. All Towers and Heroes can be used in this game mode.

Properties

( — )

Challenge rules

Max monkeys: Default
Starting cash: Default
Lives: Default
Start round: Default
End round: Default

Modifiers

—

Allowed towers

The game starts at Round 1 and the gameplay will be the same as a game of Medium until Round 39. A banner in the top of the screen will indicate the number of remaining rounds before the Boss appears.

In round 40 the Boss spawns in a fixed point near the entrance (each Boss has a themed visual of its spawning point) and will start moving. The banner will change to the health bar of the boss and will indicate if it has any property or immunity, if any (ex. Camo, Ceramic, Lead, Purple), alongside any other information relevant to the Boss (ex. Blastapopoulos heat bar). While the Boss is on the screen there will not be breaks between rounds, even if Auto-start is off.

If the Boss is defeated, it will return again in Round 60 with much greater strength and and this will be repeated in Rounds 80, 100 and 120. Each of this five stages is known as a Tier. The tier will be indicate above the Boss' Health bar with some stars.

To achieve Victory the player must defeat the Tier 5 boss and the game will end at the end of the round where this Tier is defeated (it is not necessary to keep playing until Round 140). The player will be defeated if all lives are lost, if the Boss reaches the exit or if the Boss is not defeated within 20 rounds since spawning.

All the bosses also have a harder difficulty available, known as an Elite Boss, with much higher Health and stronger abilities.

if there is a Boss Bloon Event active, the featured Boss cannot be selected in Boss Challenge.

Rounds

The game starts at Round 1 and the gameplay will be the same as a game of Medium until Round 39. In round 40 the Boss appears in a fixed point near the entrance (each Boss has a themed visual of its spawning point) and will start moving in that track. While the Boss is on the screen there will not be breaks between rounds, even if Auto-start is off.

Rounds where the Boss spawns have different Bloons than the standard set (hence the custom rounds rule), for most Bosses, with the exception of Dreadbloon, the changes are:

Round	Changes
40	MOAB replaced by 6 Ceramic Bloons
60	BFB replaced by 6 MOABs
80	ZOMG replaced by 6 BFBs
100	Bloonarius, Lych and Phayze: BAD replaced by 10 ZOMGs and 15 DDTs Vortex and Blastapopoulos: BAD replaced by 4 ZOMGs and 6 DDTs

Bloonarius, Phayze and Blastapopoulos have no further changes. Lych, Vortex and Dreadbloon feature changes on other rounds as well (see the page of each boss for details).

The game is saved after every round like any other standard game mode, but only one save is conserved per Boss. In addition to this, the game will also conserve a checkpoint at Round 20, 40, 60, 80, 100 and 120 that the players can return to by paying some some Monkey Money. The cost starts at  25 and increases by an additional  25 every 20 rounds. If the player is defeated they may also choose to restart the last round by paying twice the amount of the 20 round reset. Exiting the the game and returning only restarts the current round with no additional penalties, notice that if the Boss is active, the game will resume immediately upon loading.

Boss Path

If the map only has one path or a designated one for MOAB-Class Bloons (with some exceptions listed below), the boss will use it, otherwise one of the available paths will be the designated boss path which is fixed in any playthrough, and will use it even if would not be normally used on the round it spawns. For example, in Bloody Puddles, the boss will always appear in the middle track moving from top to bottom. Bloonarius Prime and Ancient Portal have exclusive paths for the bosses.

The paths the bosses will use are the following:

• 
  Luminous Cove - Left
• 
  Water Park - Lower
• 
  Polyphemus - Top
• 
  Quiet Street - Top Bloon path
• 
  Bloonarius Prime - Starts in the left doing the loop, then crosses over the rocks to the right path.
• 
  Balance - Starts at the right, then enters to the center from the orange top right path before exiting through the blue middle left path.
• 
  Encrypted - Left
• 
  Bazaar - Top
• 
  Adora's Temple - Left to right
• 
  Spring Spring - Top
• 
  Haunted - Left
• 
  Firing Range - Top left to bottom right
• 
  Chutes - Left
• 
  Rake - Left
• 
  Ancient Portal - Starts from the lower right, crossing over the portal to the left path.
• 
  Castle Revenge - Top
• 
  Erosion - Middle, regardless of round number
• 
  Midnight Mansion - Top left to bottom right
• 
  Sunken Columns - Right (starting from the middle left)
• 
  X Factor - Top left to bottom right
• 
  Mesa - Lower
• 
  Spillway - Top left to top right
• 
  Pat's Pond - Top
• 
  High Finance - Top right to bottom left
• 
  Underground - Top
• 
  Dark Dungeons - Middle
• 
  Sanctuary - Top left to middle right
• 
  Ravine - Top right to middle left
• 
  Infernal - Top
• 
  Bloody Puddles - Middle, top to bottom
• 
  Quad - Left to right
• 
  Dark Castle - Top
• 
  Muddy Puddles - Middle left
• 
  #Ouch - Horizontal top
• 
  Protect The Yacht - Left

Battle Mode

The player can enable the Battle Mode by checking a box in the right side of the screen, by doing so the ruleset will also add a few more restrictions to match those of Ranked Mode in Boss Events. In addition to that, the player must select one of three scoring types: Fastest Time, Least Tiers or Least Cash. The game will keep track of the best score achieved for a specific Boss, Map, Scoring Type and Difficulty (Normal/Elite).

Properties

( — )

Challenge rules

Max monkeys: Default
Starting cash: Default
Lives: Default
Start round: Default
End round: Default

Modifiers

—

Allowed towers

For further information on how the scoring system works consult the Scoring section of Boss Bloon Event.

Strategy

Consult the Strategy section of Boss Bloon Event for advice, as both game modes are extremely similar, what works in events is very likely to be useful for Boss Challenge as well.

Update history

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Version 48.0

• Co-op: Default map split now set to Free-for all.
• Co-op: Map split can now be changed.
• The game will now keep track of the highest tier which has been defeated.

Version 51.0

• Paragon limit is now applied per player and not globally

Version 54.0

• Diamondback is now available

Version 55.0

•  Corrected Lych's roundset within Boss Challenge mode
• Projectiles no longer spawn sub-projectiles when destroyed by the Boss Bloon entrance
  • Note: This is an overall nerf for towers such as the Mega Massive Munitions Factory

Gallery

Screenshots

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