Bloons TD 6 now has 18 heroes and 26 monkey towers, and Ninja Kiwi rebalances them every couple of months. This tier list ranks every one of them for Version 57.4, the patch released on October 22, 2026. Every price, upgrade name and ability below was checked against the community-run Blooncyclopedia wiki rather than copied from older lists, and where our ranking disagrees with the popular ones, we explain why.
The short version
- Best hero overall: Sauda. She costs $600 on Medium, carries the early game, and is one of the two heroes the Bloons wiki recommends to newer players.
- Best heroes for CHIMPS: Psi and Adora, with Corvus close behind if you can manage his spells.
- Best free hero: Obyn Greenfoot, who unlocks at player level 28 with no Monkey Money.
- Best towers: Monkey Village, Alchemist, Ninja Monkey, Monkey Sub and Glue Gunner. All five make the towers around them better.
- The newest additions: Dan D'Monke (hero, Version 55) lands in B tier, and the Skywarden (tower, Version 56) in C tier for now.
How This BTD6 Tier List Ranks Heroes and Towers
Every tier list is an opinion, so here is the yardstick behind ours. Each hero and tower was judged on three questions:
- Value for the price. A $205 tower that does a job well beats a $2,000 one that does it slightly better, because early cash is the scarcest resource in the game.
- Range of modes. Does it hold up from the campaign on Easy through Impoppable and CHIMPS, or does it shine in only one place?
- Self-sufficiency. Can it carry a defense, or does it only work next to one specific partner?
Heroes are judged across all 20 levels, and towers by their best upgrade path, not their weakest. The tiers mean: S build your defense around it; A strong in most games; B good on the right map or in the right strategy; C niche, or outclassed by a cheaper option.
Paragons are not ranked separately, because they are the end point of a tower's progression rather than a tower of their own. That distinction trips up some lists: you will find tier lists that rank Herald of Everfrost as a hero, but it is the Ice Monkey's Paragon.
BTD6 Hero Tier List (Version 57)
Costs are on Medium difficulty and come from each hero's page on the Blooncyclopedia hero list. "Free" heroes unlock automatically when you reach the player level shown; the rest cost Monkey Money once you reach that level.
| Tier | Hero | Cost (Medium) | Unlock | Best for |
|---|---|---|---|---|
| S | Sauda | $600 | 5,000 MM, level 25 | Early game, maps with overlapping lanes |
| S | Psi | $1,000 | 5,000 MM, level 35 | CHIMPS, Advanced and Expert maps |
| S | Adora | $1,000 | 5,000 MM, level 25 | CHIMPS early game, Super Monkey builds |
| A | Obyn Greenfoot | $650 | Free, level 28 | Druid and Skywarden builds |
| A | Geraldo | $750 | 7,000 MM, level 35 | Flexible play with shop items |
| A | Benjamin | $1,200 | 3,000 MM, level 15 | Economy in every mode except CHIMPS |
| A | Rosalia | $875 | 5,000 MM, level 25 | MOAB damage, flexible positioning |
| A | Corvus | $1,325 | 7,000 MM, level 35 | CHIMPS and Half Cash |
| A | Silas | $850 | 5,000 MM, level 25 | Ice and freeze builds |
| B | Dan D'Monke | $650 | Added Version 55 | Moving towers, protecting lives |
| B | Gwendolin | $725 | Free, level 14 | Tack Shooter builds |
| B | Striker Jones | $700 | Free, level 21 | Bomb Shooter and Mortar builds |
| B | Pat Fusty | $800 | 3,000 MM, level 15 | Ceramic-heavy rounds, land or water |
| B | Etienne | $650 | 5,000 MM, level 25 | Maps with line-of-sight blockers |
| B | Admiral Brickell | $900 | 5,000 MM, level 35 | Water maps only |
| C | Ezili | $550 | 3,000 MM, level 25 | Stripping Bloon properties |
| C | Quincy | $540 | Free, tutorial | Learning the game |
| C | Captain Churchill | $2,000 | 2,500 MM, level 15 | Raw damage, if you can afford him |
S S-Tier Heroes
Sauda is the safest first pick in the game. She attacks very quickly, and her sword slashes deal double base damage to Ceramic and MOAB-Class Bloons. Her abilities are what lift her to S tier: according to her wiki page, Sword Charge trivializes mid-game rounds such as 63, 76 and 78, and she is especially strong on maps with overlapping lanes, such as Quad. Her limits are short range and late-game scaling. From level 7 she deals bonus damage to stunned Bloons, and from level 11 to slowed Bloons and Bloons taking damage over time, so in the late game she needs a Glue Gunner, Ice Monkey or similar support to keep up. She cannot pop Lead until level 13.
Psi attacks Bloons anywhere on the map, even through line-of-sight blockers, and always sees Camo. That removes two of the most common reasons a defense collapses. Their psionic attack freezes a Bloon in place, then destroys the whole Bloon after a short delay. Early on, Psi cannot target Lead, Purple, Ceramic or MOAB-Class Bloons, but levels unlock them one by one, starting with Lead at level 6. The wiki calls CHIMPS Psi's favored mode, because Psi levels faster on Advanced and Expert maps. The catch is level 20: its ZOMG and DDT instant kills usually need a Monkey Sub's Energizer to reach in a normal game.
Adora fires seeking Divine Bolts that deal Plasma damage, so they pop Lead but not Purple. The wiki describes her CHIMPS early game as incredibly strong, because her bolts are accurate and respond well to buffs. At level 20 she gains a powerful transformation when you upgrade a Sun Temple into a True Sun God, which makes her the default partner for late-game Super Monkey builds. Her Blood Sacrifice ability trades towers for XP, and the CHIMPS rules do not count a sacrifice as selling. Her one blind spot is Camo: she cannot see it, so plan a Radar Scanner Village or another Camo source.
A A-Tier Heroes
Obyn is the best hero you never pay Monkey Money for. His spirit wolves hit hard and home in on Bloons, and as he levels he buffs nearby Druids and Skywardens, then all Magic towers, and gains a Nature's Ward Totem that slows Bloons around it. The wiki calls him the best hero to pair with Druids and Skywardens, and its CHIMPS guide lists Obyn with an Avatar of Wrath Druid as a beginner-friendly strategy.
Geraldo runs a shop: you buy consumable items with cash, including sub-towers, tower buffs and traps, and stock refills over the following rounds. That flexibility makes him one of the most forgiving heroes in normal play, and many popular lists rank him S. We have him in A for two reasons from his wiki page: higher-level players consider him an average hero for CHIMPS, and his items cost cash you would otherwise save for expensive late-game supports. Ninja Kiwi's own patch notes say he has "cooled off" from his earlier peak. He has no activated abilities and cannot detect Camo on his own.
Benjamin is the only hero who never damages Bloons directly. He earns cash at the end of every round, and from level 14 he also generates 10 lives per round. Outside CHIMPS, that income snowballs into bigger towers sooner, which is why the wiki recommends him, alongside Sauda, as an easy early choice. In CHIMPS his income is switched off. He keeps a niche there, since his Syphon Funding ability helps against the huge rounds 94, 96 and 98, but the wiki's CHIMPS guide puts him on the list of picks to avoid.
Rosalia flies on a jetpack from a workshop: you place the workshop, then move her anywhere within its range. She switches between a laser gun that hits hard, especially against MOAB-Class Bloons, and a grenade launcher with high pierce whose grenades later bounce and split into clusters. Some lists put her in S. She lands in A here because getting full value means repositioning her and switching weapons throughout the game.
Corvus fights through a flying Spirit companion while haunting nearby Bloons. Popping haunted Bloons fills a pool of Mana, which he spends on spells from his Spellbook. The wiki says he stands out in CHIMPS and Half Cash, because well-timed spells save a lot of cash. He would be S tier for experienced players, but he is the second most expensive hero and the hardest to play well.
Silas is the ice hero. His ricocheting orbs cover Bloons in rime, which slows them and makes them take more damage from ice attacks, then freeze them and finally shatter them. He detects Camo, can be placed on land or water, and lets land towers be placed on water near him. He is a natural fit for Ice Monkey and freeze-based builds, and weaker outside them.
B B-Tier Heroes
Dan D'Monke is the newest hero, and he has two forms. His base form has a fast melee attack and focuses on support, reducing lives lost and generating lives. His alternate form, The Masqued Macaque, trades that support for damage, including occasional chain lightning. In both forms he is immune to negative effects such as Boss Bloon attacks. According to his wiki page, players mostly use him for his Reposition ability, a cheap substitute for the Heli Pilot's Support Chinook, and his mid-game is his strongest stretch. He is a useful helper, not a hero you build a defense around.
Gwendolin burns Bloons with a flamethrower. Her main attack cannot target Camo, and she cannot pop Purple Bloons without support until level 16. She earns her place through Tack Shooters: the wiki's CHIMPS guide recommends her with The Tack Zone and Inferno Ring as a beginner-friendly strategy.
Striker Jones fires explosive bazooka shells that knock Bloons back, and at higher levels he buffs Bomb Shooters and Mortar Monkeys. He cannot target Camo without support. The wiki lists Striker with a group of MOAB Assassin Bomb Shooters as another beginner-friendly CHIMPS strategy.
Pat Fusty slams Bloons with his fists for area damage, with extra damage to Ceramics, and at higher levels his slams stun. He can be placed on land or water but has short range and no Camo detection.
Etienne never attacks directly. He controls drones that fly over line-of-sight blockers to chase Bloons inside his range, starting with one and reaching four at levels 19 and 20. That makes him a good fit for cluttered maps.
Admiral Brickell is the first purely water-based hero. She drops homing sea mines and fires a high-damage revolver. On maps with good water she is strong; on dry maps you cannot place her at all, which caps her at B.
C C-Tier Heroes
Ezili curses Bloons with damage over time, sees Camo at every level, and at higher levels strips special properties from Bloons, even Camo from DDTs. She cannot pop Purple Bloons without her Heartstopper ability. That is a narrow toolkit for a hero slot.
Quincy is the cheapest hero and a decent generalist whose arrows ricochet between Bloons. He is the right hero to learn the game with, but he cannot damage DDTs at any level without support, and every hero above him does his job better.
Captain Churchill drives a tank whose shells explode several times, and he later adds a machine gun and Camo detection. The damage is real, but at $2,000 on Medium he costs more than three Saudas, which delays your whole early defense.
Can't install BTD6 on this computer? The four original Bloons Tower Defense games run free in your browser, with no download and no account.
Play Bloons Tower Defense 4BTD6 Monkey Tower Tier List (Version 57)
Base costs are on Medium, before upgrades, from each tower's wiki page. The "key upgrades" column names the paths that earn the tier.
| Tier | Tower | Class | Base cost | Key upgrades |
|---|---|---|---|---|
| S | Monkey Village | Support | $1,200 | Radar Scanner, Monkey Intelligence Bureau |
| S | Alchemist | Magic | $550 | Berserker Brew, Permanent Brew |
| S | Ninja Monkey | Magic | $400 | Bloon Sabotage, Grand Saboteur |
| S | Monkey Sub | Military | $325 | Energizer, Armor Piercing Darts |
| S | Glue Gunner | Primary | $225 | MOAB Glue, The Bloon Solver |
| A | Heli Pilot | Military | $1,500 | Support Chinook, Comanche Commander |
| A | Spike Factory | Support | $1,000 | Perma-Spike, Super Mines |
| A | Ice Monkey | Primary | $400 | Arctic Wind, Super Brittle |
| A | Super Monkey | Magic | $2,500 | Sun Temple, True Sun God |
| A | Dartling Gunner | Military | $850 | Ray of Doom, Bloon Exclusion Zone |
| A | Sniper Monkey | Military | $350 | Elite Sniper, Cripple MOAB |
| A | Banana Farm | Support | $1,250 | Income (disabled in CHIMPS) |
| B | Engineer Monkey | Support | $350 | Overclock, Ultraboost |
| B | Druid | Magic | $400 | Avatar of Wrath |
| B | Mermonkey | Magic | $300 | Lord of the Abyss, Popseidon |
| B | Wizard Monkey | Magic | $250 | Archmage, Prince of Darkness |
| B | Tack Shooter | Primary | $260 | The Tack Zone, Inferno Ring |
| B | Bomb Shooter | Primary | $375 | MOAB Assassin, MOAB Eliminator |
| B | Boomerang Monkey | Primary | $315 | Glaive Lord, Perma Charge |
| B | Beast Handler | Support | $250 | Megalodon, merged beasts |
| C | Mortar Monkey | Military | $600 | Blooncineration |
| C | Monkey Ace | Military | $800 | Flying Fortress, Sky Shredder |
| C | Monkey Buccaneer | Military | $400 | Pirate Lord, Trade Empire |
| C | Desperado | Primary | $300 | Golden Justice, The Blazing Sun |
| C | Skywarden | Magic | $205 | Farwind Seer (still new) |
| C | Dart Monkey | Primary | $200 | Crossbow Master, Plasma Monkey Fan Club |
S S-Tier Towers
Monkey Village never attacks, and it is still the most valuable tower in the game. A base Village raises the range of every tower around it by 10%. Its middle path is where the value is: Radar Scanner lets nearby towers see Camo Bloons, Monkey Intelligence Bureau lets them pop every Bloon type, and the tier 5 Homeland Defense ability doubles the attack speed and pops of every Monkey on the map for 20 seconds. The bottom path turns the Village into income, which is great in normal games and useless in CHIMPS.
Alchemist throws acid that damages Bloons over time, but you buy it for Berserker Brew, a buff that makes a nearby tower stronger for a while. The wiki calls the top path generally the most useful because of its array of buffs, and the tier 5 Permanent Brew ($48,000 on Medium) makes the brew permanent. Brew works best on fast towers with many projectiles; the CHIMPS guide's examples are a Bloonjitsu Ninja and an Armor Piercing Darts Sub.
Ninja Monkey sees Camo Bloons with no upgrades at all, which already solves one of the game's most common leaks. Its middle path adds Bloon Sabotage, a global slowdown that the wiki singles out as particularly strong against DDTs, and Grand Saboteur ($22,000), which makes MOAB-Class Bloons spawn with less health while the sabotage runs. The top path's Grandmaster Ninja throws eight shurikens per shot and, with buffs, holds up in deep Freeplay and Boss events.
Monkey Sub is one of the strongest cheap openers in the game, as long as the map has water. Its homing darts and, with Advanced Intel, the ability to fire at anything other towers can see make it excellent in the early game, where the wiki notes Subs usually build toward 2-0-2. Later it becomes a support tower: Energizer ($28,000) cuts every ability cooldown on the map by 20% and makes heroes in its radius earn XP 50% faster, while Pre-emptive Strike fires a powerful missile at every MOAB-Class Bloon as it enters. Its only real weakness is that it needs water.
Glue Gunner is the cheapest tower in S tier. Slowing one Bloon also holds back every Bloon inside it, so, as the wiki puts it, Glue Gunners are very powerful against spaced rounds even with low upgrades. MOAB Glue is one of the cheapest supports in a CHIMPS run, and The Bloon Solver is a strong late-game cleanup tower. Version 57 trimmed it: Stickier Glue now lasts 18 seconds instead of 24, and the glue durations on MOAB-Class Bloons were cut as well. It is still S tier.
A A-Tier Towers
Heli Pilot hovers over the track and moves around the map instead of sitting in one spot. Support Chinook can pick up and move other towers, and the CHIMPS guide specifically warns not to ignore it, since it works without income. Comanche Commander calls in three extra Comanches permanently. The high base cost keeps it out of S.
Spike Factory drops spike piles on the nearby track, which makes it the classic last line of defense. Perma-Spike ($30,000) makes high-damage spikes almost permanent, and Super Mines ($125,000) lays exploding mines that can wipe out almost anything.
Ice Monkey freezes and slows everything around it, and Arctic Wind is a standard support piece in hard modes. Super Brittle ($28,000) makes frozen Bloons take huge damage. Ninja Kiwi pointed to "growing Ice Monkey value in powerful freeze synergies" when it lowered Super Brittle's attack rate and raised Snowstorm's price in Version 56, so it is a little less able to do everything alone than it was earlier in 2026.
Super Monkey is the most expensive base tower and, the wiki says, the most powerful. Its top path builds to the Sun Temple and the True Sun God, a $500,000 upgrade on Medium that is the strongest thing most players will ever build. The other tier 5s, The Anti-Bloon ($70,000) and Legend of the Night ($165,650), are late-game monsters too. It sits in A only because it takes so long to afford.
Dartling Gunner fires wherever you point your cursor. That manual aim is a weakness on mobile and in long sessions, but its tier 5s are some of the strongest single towers in the game: Ray of Doom ($75,000), M.A.D ($65,000) for MOABs, and Bloon Exclusion Zone ($58,000).
Sniper Monkey hits Bloons anywhere on the map. Elite Sniper is one of the towers the CHIMPS guide names as still useful in that mode, and Version 57 made it better: its ammo crate now also buffs up to two nearby Snipers. Cripple MOAB ($32,000) immobilizes MOABs and makes them take extra damage from every other attack. Version 57 also gave the Sniper its Paragon, S.P.I.D.E.R. Monkey.
Banana Farm is the backbone of the economy in every mode except CHIMPS, where it is disabled entirely. Outside CHIMPS, an early farm pays for everything else on this list, and Monkey Wall Street ($70,000) adds lives every round on top of its income.
B B-Tier Towers
Engineer Monkey ($350) builds sentries and traps, but its real value is Overclock, which boosts another tower; the tier 5 Ultraboost ($72,000) gives Ultra-Overclocked Monkeys a small permanent boost every time they are overclocked.
Druid ($400) shines with the right hero. Avatar of Wrath ($45,000) does more damage the more Bloons are on screen, and paired with Obyn it is one of the wiki's beginner CHIMPS strategies.
Mermonkey ($300), added in Version 44.0, throws tridents that splash damage around every Bloon they hit. Its tier 5s, Lord of the Abyss, Popseidon and The Final Harmonic, give it three distinct roles.
Wizard Monkey ($250) is cheap and versatile, with Archmage ($32,000), Wizard Lord Phoenix ($50,000) and the Necromancer path's Prince of Darkness ($26,500). Its base bolts cannot pop Lead or Purple Bloons.
Tack Shooter ($260) fires eight tacks at very short range. The Tack Zone ($20,000) and Inferno Ring ($45,500) are strong with Gwendolin, and Version 56 rebalanced crosspath prices so that Hot Shots could get a damage increase.
Bomb Shooter ($375) pops Lead from the start, and MOAB Assassin and MOAB Eliminator ($26,000, whose Assassinate ability deals six times the damage on a short cooldown) are its best upgrades. Version 57 limited Bomb Blitz's passive ability to one trigger per round.
Boomerang Monkey ($315) scales into Glaive Lord, Perma Charge ($35,000, permanent super-fast attack speed) and MOAB Domination ($50,000). Solid, but other towers do each of those jobs more cheaply.
Beast Handler ($250), added in Version 36.0, commands beasts that you can merge between handlers. Its Megalodon ($45,000) is huge, but it needs three additional Orca Handlers to control, which is a big commitment.
C C-Tier Towers
Mortar Monkey ($600) shells any spot on the map, with random spread. Blooncineration ($40,000) is a strong MOAB burner, and since Version 56 the bottom path's Increased Accuracy hits Camo Bloons directly.
Monkey Ace ($800) flies over the track and fires eight darts in a fixed spread. Flying Fortress ($90,000) is huge, but you have less control over where an Ace fights than with almost any other tower.
Monkey Buccaneer ($400) needs water. Its Merchantman and Trade Empire path makes money, and Pirate Lord ($29,000) plunders extra cash from each MOAB-Class Bloon it brings down, but both shine mainly outside CHIMPS.
Desperado ($300), added in Version 49.0, fires twice per attack with long range but low pierce. Version 56 helped it: Big Iron now pops Lead, giving it an early anti-Lead role.
Skywarden ($205) is the newest tower, added in Version 56.0 on August 4, 2026. Its arrows hit up to four Bloons each but cannot pop frozen or Lead Bloons, and its three paths (wind, storm and ice) all lean on combos. The wiki recommends grouping several tier 3 or higher Skywardens of the same path together, and says its ice path is much weaker without other towers to freeze Bloons. It is cheap and may climb as players find builds, but for now it is C tier.
Dart Monkey ($200) is the cheapest tower and a fine opener; the wiki still describes a triple Dart start as one of the most flexible openings. Its darts cannot pop Lead or frozen Bloons, though, and by the mid-game almost everything else outclasses it, Crossbow Master ($21,500) and Plasma Monkey Fan Club ($45,000) included.
How the Rankings Change in CHIMPS
CHIMPS stands for no Continues, Hearts lost, Income, Monkey Knowledge, Powers or Selling. According to the wiki's CHIMPS page, it is played on Hard, runs from round 6 to round 100, and gives you exactly one life. The only cash comes from your starting cash, popping Bloons and the end-of-round bonus. Banana Farms are disabled, Hero Boosters and Powers are off, and you cannot sell most towers.
That reshuffles the tiers:
- Drop: Benjamin, Banana Farm, the Village's Monkey Town path and the Buccaneer's trade path. The wiki's CHIMPS guide tells you to avoid towers that have little purpose without cash or lives, naming Monkey Town and Benjamin.
- Rise: Psi, Adora and Corvus. Psi's favored mode is CHIMPS, Adora's early game is described as incredibly strong there, and Corvus's spells save cash.
- Keep: Elite Sniper and Support Chinook, which the guide names as still useful without income, and cheap supports like Berserker Brew and MOAB Glue.
Plan around the dangerous rounds, too. The wiki flags rounds 24, 28, 59, 63 and 78 as worth noting because they introduce new Bloon types or spike in difficulty, and CHIMPS punishes a defense that is not ready for them.
What Changed in 2026 (Versions 53 to 57)
Ninja Kiwi shipped five major updates in 2026. These are the ones that matter for this tier list, with dates from the wiki's BTD6 update history:
| Version | Released | What changed |
|---|---|---|
| 54.0 | April 8, 2026 | Druid Paragon (Root of all Nature); Diamondback Boss added to the base game |
| 55.0 | June 3, 2026 | New hero: Dan D'Monke |
| 56.0 | August 4, 2026 | New tower: Skywarden. Super Brittle's attack rate lowered and Snowstorm made pricier; Desperado's Big Iron pops Lead; Mortar's Increased Accuracy hits Camo |
| 57.0 | October 6, 2026 | Sniper Paragon (S.P.I.D.E.R. Monkey); Stickier Glue cut from 24 to 18 seconds; Bomb Blitz passive limited to once per round; Elite Sniper's ammo crate shared with up to two nearby Snipers |
| 57.4 | October 22, 2026 | Latest patch at the time of writing |
One more change is on the way. The wiki's notes from the Version 57 update list a new Support tower as planned for late 2026. When it arrives, this list will be updated.
Best Hero and Tower Pairings
A hero is only as good as the towers around it. These pairings come from the heroes' own buffs and from the strategies the wiki recommends:
| Hero | Pair with | Why it works |
|---|---|---|
| Sauda | Glue Gunner, Ice Monkey | She deals bonus damage to stunned, slowed and damaged-over-time Bloons |
| Obyn Greenfoot | Druid (Avatar of Wrath), Skywarden | He buffs both directly; a wiki beginner CHIMPS strategy |
| Gwendolin | Tack Shooter (The Tack Zone, Inferno Ring) | A wiki beginner CHIMPS strategy |
| Striker Jones | Bomb Shooter (MOAB Assassin) | He buffs explosive towers; a wiki beginner CHIMPS strategy |
| Silas | Ice Monkey | He buffs ice attacks, and rimed Bloons take more ice damage |
| Adora | Super Monkey (Sun Temple) | Her level 20 transformation is tied to the True Sun God |
For towers, the classic combination is Alchemist's Berserker Brew on a fast, many-projectile tower such as a Bloonjitsu Ninja or an Armor Piercing Darts Sub, with a Village nearby for range and Camo. If you want more tower defense in the same spirit once you have finished BTD6, our list of games like Bloons TD 6 covers every platform, and our best co-op tower defense games roundup includes BTD6's own co-op mode.
Play the Classic Bloons Tower Defense Games Free
BTD6 is a paid download. The Flash-era games that started the series are not: all four run free in your browser here, with no install. Each one shows where a BTD6 mechanic began, and the facts below come from the Blooncyclopedia pages for each game.
Bloons Tower Defense (2007)
The original, released in August 2007, with just five tower types: Dart, Tack, Ice, Bomb and Super Monkey. Each has two upgrades, except the Super Monkey, which has one.
Play BTD1 freeBloons Tower Defense 2 (2007)
Arrived two months later with three maps, each tied to its own difficulty, plus a new tower type and two new Bloon types. Harder maps raise every price and cut your starting lives.
Play BTD2 freeBloons Tower Defense 3 (2008)
The first game with two upgrades per path, eight tracks, and track and difficulty chosen separately. It also introduced the MOAB, the blimp every later game is built around.
Play BTD3 freeBloons Tower Defense 4 (2009)
Revised the upgrade system to a single path of four upgrades per tower, and added Premium Upgrades, new game modes, map difficulty and Challenges.
Play BTD4 freeFor the full story of how the series got from a five-tower Flash game to BTD6, read our short history of Bloons Tower Defense. If you play in class, our Blooket Tower Defense strategy guide covers a mode whose layered enemies are based on Bloons.