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Creates super-powerful but highly unstable sentries.
~ In-game description

Sentry Champion, formerly named Sentry Paragon until update 28.0, is the 5th upgrade of Path 1 for the Engineer Monkey in Bloons TD 6. It allows the Engineer to build purple sentries that shoot high-damage plasma and explode instead of despawning, destroying nearby bloons. Each active Champion Sentry shoots plasma at 15 times per second, deals 2 damage per shot, and each shot has 5 pierce (6 with 5-0-1 or 5-0-2). Once a Sentry Champion is deactivated, it undergoes a brief 2-second phase (or immediately if manually sold) before exploding at 50 blast radius with 100 damage and up to 50 pierce.

Although the purple sentries, called Champion Sentries, replace all of the Sentry Expert's four specialized sentries, Sentry Champion has the highest overall DPS out of all Engineer Monkeys (except Master Builder, the Engineer Monkey Paragon), excluding instakills from the XXXL Trap upgrade.

It costs $27,200 on Easy, $32,000 on Medium, $34,560 on Hard and $38,400 on Impoppable.



Sentry Champion tints the Engineer's goggles purple, and paints essentially all their equipment's handles purple as well; they gain a new silvery wrench, a screwdriver, a sledgehammer, and a grabbing claw extending from their backpack.

In the upgrade portrait, the Sentry Champion Engineer sits on a Champion Sentry looking crazed, sticking tongue out, and attempting to balance on the Champion Sentry. The Champion Sentry is flashing.

Basic Mechanics[]

Sentry Champion changes his four specialized sentries (Crushing, Boom, Cold, and Energy) for a single type of sentry called a Champion Sentry. Champion Sentries shoot rapid-fire plasma and explode plasma when its lifespan expires. For further information about the Champion Sentry, refer to #Types of Sentry.

Targeting Priorities[]

Sentry Expert targets bloons using the standard targeting priorities. Its main attack shoots straight movement projectiles.

  • First: Targets the first bloon visible within its range.
  • Last: Targets the last bloon visible within its range.
  • Close: Targets the closest bloon visible within its range.
  • Strong: Targets the strongest bloon visible within its range.

Sentry Champion, like all Engineers with Path 1 upgrades, can deploy sub-towers called sentries, targeting them such that they prioritize unoccupied land. Newly spawned sentries inherit the parent Engineer's targeting priorities, and its main attack also shoots straight movement projectiles. Targeting priority for all sentries use standard targeting priorities (First, Last, Close, Strong) and can be changed at any time.

Champion Sentry shoots straight movement projectiles as its main attack. When lifespan expires, the Champion Sentry eventually explodes plasma in an area of effect, either instantly or after a time delay depending on manual/automatic input.


Updated as of Version 32.0. Listed prices exclude external buffs, any sacrifices, and Monkey Knowledge.
Purchase Sell
Costs Easy Medium Hard Impoppable Easy Medium Hard Impoppable
Upgrade (5-X-X) $27,200 $32,000 $34,560 $38,400 -
Total (5-0-0) $30,920 $36,375 $39,280 $43,650 $21,644 $25,463 $27,496 $30,555
Crosspath (5-1-0) $31,130 $36,625 $39,550 $43,950 $21,791 $25,638 $27,685 $30,765
Crosspath (5-2-0) $31,425 $36,975 $39,930 $44,370 $21,998 $25,883 $27,951 $31,059
Crosspath (5-0-1) $31,300 $36,825 $39,765 $44,190 $21,910 $25,778 $27,836 $30,933
Crosspath (5-0-2) $31,485 $37,045 $40,000 $44,455 $22,040 $25,932 $28,000 $31,119

This upgrade's prices (or included crosspath's prices) are affected by the following MK: BetterSellDealsIcon.png Better Sell Deals

Type of Sentry[]

Champion Sentry[]

Official Artwork

The Champion Sentry is purple and appears much larger than previous sentries, with a slightly more complex design. It shoots plasma at a very high speed and deals 2 damage per shot with a pierce of 5 per plasma blast. Plasma can pop Frozen Bloons and Lead Bloons, however it cannot pop Camo Bloons (unless camo detection is granted) or Purple Bloons, unless supported with another nearby tower buff such as Monkey Intelligence Bureau. Note that the sentries don't have to be in range of any buffs to receive it. Only the Engineer themselves has to be in range of tower buffs for the sentries to also be affected.

Unlike other sentries, it explodes upon despawning, destroying any Bloons in the explosion radius and heavily damaging MOAB-class Bloons, resembling the Tech Terror's ability. The explosion radius is very slightly larger than the sentry's own range, but it cannot pop Purples unlike Tech Terror's ability.

Champion Sentries disable themselves after 25 seconds (30 with MK). Alternatively, a Champion Sentry can be sold to produce an on-demand explosion. Upon automatic disabling, a Champion Sentry requires a 2-second cooldown before it finally explodes. Manually exploded Champion Sentries bypass the timed explosion cooldown.


  • Damage Type: Plasma Type (pops Black, White, Lead, Frozen) Plasma
  • Pierce: 5 (6 with 5-0-1)
  • Damage: 2
  • Attack Speed: ~15 attacks/second
  • Range: 50


  • Damage Type: Plasma Type (pops Black, White, Lead, Frozen) Plasma
  • Pierce: 50
  • Damage: 100
  • Range: 50



Sentry Champion is a solid DPS option, although alternative options exist that fulfill a similar purpose. The main strength of Sentry Champion comes from its Champion Sentry plasma attacks, which deal a respectable amount of overall damage to both MOAB-class and bloons. Expired sentries additionally explode after a short delay for an unreliable but useful cleanup. Adding attack speed buffs such as Jungle Drums or Overclock to the Sentry Champion Engineer is strongly recommended to maximize the Engineer's damage potential. However, Sentry Champion does have extreme synergy with Call To Arms and Homeland Defense, boosting its potential DPS by a huge amount.


  • If the Sentry Champion Engineer has any attack speed boosts active, it can produce more Sentries at a time and increasing its damage output.
    • Try adding Overclock to the Sentry Champion, as this allows the Sentry Champion to consistently produce sentries at a significantly improved rate. Although it doesn't improve the sentries themselves, the deployment rate of Champion Sentries increases with attack speed buffs.
    • Jungle Drums can improve both the Champion Sentry deployment rate and the Champion Sentries themselves, provided the main Engineer has this buff.
    • Adding Call To Arms or Homeland Defense greatly improves its damage potential by improving both Champion Sentry deployment rate and Champion Sentry attack speed. On top of this is gaining extra pierce for all its attacks.
  • When crosspathing upgrades to enhance the Sentry Champion's sentries, it's best to choose the 5-2-0 crosspath over the 5-0-2 crosspath. With Deconstruction, Champion Sentries deal +1 damage versus MOAB-class and +1 versus Fortified, and since the main issues during late-game are generally MOAB-class and Fortified, this crosspath is almost always better than just granting +1 pierce via 5-0-2. Pin cannot affect Ceramics, and since Super Ceramics form the majority of late-game, the Pin effect simply isn't worth it for how deep in the game it goes.
  • Dark Castle is an especially good map for the Sentry Champion. Placing him between two paths gives his exploding sentries a chance to hit densely-packed Bloons on both sides.

Version History[]

Converting a support role into purely high DPS role isn't always the best tradeoff for Sentry Champion, but with a series of buffs to this upgrade it is now a worthwhile upgrade to go for. Sentry Champion has become quite usable on a practical CHIMPS game, as a result of various buffs to its base Champion Sentries in addition to its crosspathing benefits, especially for the 5-2-0 crosspath.

Ninja Kiwi made the change of Sentry Champion's name in order to avoid confusion with Paragons, as explained in their 15th October 2021 blog.

  • Buff Sentry Paragon explosion damage increased from 70 → 85.
  • Buff Manually sold Paragon Sentries will explode with no animation delay.
  • Buff Paragon Sentry pierce increased from 3 → 5.
Continuing our efforts to make crosspaths meaningful and fit the style of each path more solidly, a number of crosspath and base level balance shifts were made.
~ Ninja Kiwi
  • Buff Sentry Paragon is now affected by crosspathing from Larger Service Area and Oversize Nails.
  • Buff Sentry Paragon sentries are deployed faster (7s → 6s).
  • Buff Sentry Paragon base sentry range increased (45 → 50).
  • Buff Sentry Paragon explosion radius now scales with sentry radius.
Engineer is quite poor in terms of crosspathing, [...]
~ Ninja Kiwi, referring to Engineer crosspathing issues
  • Buff Sentry Paragon explosion damage increased (85 → 100).
Sentry Expert has underperformed for a while, so we're adding solid crosspathing buffs to all Sentries. [...]
~ Ninja Kiwi, referring to the Deconstruction crosspath buff
  • Buff 5-2-0 crosspath now gives all sentries +1 Damage to Fortified and MOAB Class bloons.
[...] Additionally higher tier sentries will now be able to benefit from the xx2 Pin crosspath, so enjoy some laser pins. [...]
~ Ninja Kiwi, referring to Pin crosspath
  • Buff 5-0-2 crosspath now applies Pin effect to affected bloons.
Alright, Sentry Paragon is now a Champion.
~ Ninja Kiwi
  • Change Upgrade name has been changed from "Sentry Paragon" to "Sentry Champion".


When a sentry is placed:

When a Champion Sentry explodes:


Official artwork[]


  • The sentry's design is similar to Engineer's Workshop 4th tier Sentry from BTD5.
  • The Champion Sentry is the only tower that can be "sold" on CHIMPS mode, except between Version 21.0 and Version 22.0 when the sell option for Champion Sentries were disabled. When sold, it automatically activates an on-demand explosion.
  • According to Ninja Kiwi's 16th July 2021 blog, Ninja Kiwi replied "probably not!" to a question about Sentry Paragon's name change. However, in a different blog, October 15th 2021 blog, Sentry Champion had its name changed to avoid confusion with actual Paragons.
    • When the name change from 'Sentry Paragon' to 'Sentry Champion' was made in Version 28.0, it is a common joke to suggest that Sentry Paragon was "downgraded" into just a Champion, given how strong Paragons generally are.
  • The sprite for the plasma projectiles that Champion Sentries produce is noticeably different from its BTDB2 counterpart, with the former looking more like Plasma Blasts' projectiles and the latter having more "pellet-like" plasma balls.