In Bloons Tower Defense 4, experience enhanced gameplay with new towers and premium upgrade paths! This classic Flash version features expanded monkey abilities and challenging MOAB balloons. Build the perfect defense by combining different tower types strategically. Master the timing of special abilities and plan for the toughest balloon rushes!
Bloons Tower Defense 4 (BTD4) represents the pinnacle of the classic BTD era, introducing the iconic MOAB-class bloons that would define the series going forward. Released in 2009 by Ninja Kiwi, BTD4 expanded the roster to over 20 unique towers, each with extensive upgrade paths. This installment perfected the balance between accessibility and depth, making it a favorite among both casual players and hardcore strategists. The game introduced multiple tracks with varying difficulty levels, special abilities for towers, and the challenging Freeplay mode that tests even veteran players.
BTD4 introduces a robust upgrade system where each tower has two upgrade paths with 4 levels each. Players earn cash by popping bloons, with bonus money awarded for completing rounds. The game features multiple maps ranging from Beginner to Expert difficulty, each with unique layouts that require different strategies. Special Agent units can be deployed as one-time powerful allies. The Specialty Building system allows permanent upgrades to specific tower types, rewarding focused playstyles. Bloon types now include the dreaded MOAB (Massive Ornery Air Blimp) class, requiring massive firepower to defeat.
The classic starting tower with fast attack speed. Can upgrade to Triple Darts or Super Monkey Fan Club for crowd control.
Strategy: Place at track curves for maximum effectiveness. Upgrade to Spike-o-pult for early Lead bloon handling.
Fires 8 tacks in all directions. Upgrades to Ring of Fire for devastating area damage or Blade Shooter for increased pierce.
Strategy: Best placed at sharp turns where bloons spend more time in range. Ring of Fire is essential for grouped bloons.
Infinite range sharpshooter. Can target any bloon on screen. Upgrades include deadly precision and supply drop abilities.
Strategy: Set targeting to Strong to pick off dangerous bloons. Supply Drop upgrade provides bonus income.
Throws boomerangs that return, hitting bloons twice. Glaive Lord upgrade creates orbiting glaives for constant damage.
Strategy: Position where boomerangs can hit bloons on both outgoing and return paths. Glaive Ricochet excels against groups.
Fast-attacking tower that can see and pop Camo bloons naturally. Sabotage ability slows all bloons on screen.
Strategy: Essential for Camo detection. Place at least one early. Bloonjitsu upgrade is extremely cost-effective.
The ultimate tower with insane attack speed. Sun God upgrade creates a devastating plasma-firing deity.
Strategy: Save up for this late-game powerhouse. One fully upgraded Sun God can carry most maps.
Magic-wielding monkey with lightning and tornado abilities. Can strip Camo and Regrow properties from bloons.
Strategy: Lightning upgrade chains between bloons. Tempest Tornado can blow back MOABs for extra damage time.
Water-based tower with cannons and aircraft. Aircraft Carrier upgrade deploys Monkey Ace planes automatically.
Strategy: Only usable on water. Aircraft Carrier provides excellent map-wide coverage for its cost.
Beginner tracks like 'Monkey Lane' and 'Park Path' offer long paths ideal for learning tower placement. Intermediate maps like 'Bloontonium Lab' introduce multiple paths requiring balanced defense. Advanced tracks like 'Main Street' feature short paths demanding high DPS towers. Expert maps like 'Tar Pits' have extremely short paths with limited placement spots. For MOAB rounds, focus on high-damage towers like Super Monkey, Monkey Apprentice with Lightning, or groups of Bomb Towers. Freeplay mode continues indefinitely with increasingly powerful bloons - prepare towers that can handle BFBs (Brutal Floating Behemoths) and ZOMGs.
Build multiple Banana Farms early to generate income. Rush to afford a Sun God Super Monkey by round 40-50. This strategy excels on longer maps where you can survive early rounds with cheap defenses while farming.
Cover the map with Ninja Monkeys upgraded to 2-3 (Seeking Shuriken + Distraction). Their natural Camo detection and high attack speed handle most bloon types efficiently. Add a few Monkey Apprentices for lead popping.
Place multiple Bomb Towers upgraded to MOAB Mauler (4-2) near the entrance. These deal massive damage to MOAB-class bloons. Support with Ice Towers to slow bloons for maximum damage window.
For reaching high rounds in Freeplay, stack Technological Terrors (Super Monkey 4-2) with Sun Gods. Add Monkey Villages for range and attack speed buffs. Use Specialty Buildings to enhance your core towers.
Lead Bloons are immune to sharp projectiles. Use explosive towers (Bomb Tower, Mortar), fire attacks (Ring of Fire Tack Shooter), magic (Monkey Apprentice), or sharp towers with Metal Piercing upgrade.
MOABs contain 4 Ceramic Bloons when popped. BFBs (Brutal Floating Behemoth) contain 4 MOABs. ZOMGs (Zeppelin Of Mighty Gargantuaness) contain 4 BFBs. Plan your defense for the cascade of bloons!
Specialty Buildings permanently boost specific tower types. Unlock them by spending Monkey Money earned from completing games. Each building has multiple upgrade tiers providing stat bonuses to its associated tower.
Expert maps require high DPS in small areas. Start with Tack Shooters or Dart Monkeys at corners. Rush to a Super Monkey or cluster of Bomb Towers. Avoid slow-attacking towers that can't handle fast bloon rushes.
Yes! Monkey Village with Radar Scanner reveals Camo bloons for nearby towers. Monkey Apprentice can strip Camo status. Sniper Monkey with Night Vision Goggles can also target Camo bloons directly.
"I love how strategic it gets when the tougher bloons come in. Can't stop playing!"
"The graphics are kinda dated, but the gameplay is still so much fun—really makes you think."
"I keep coming back to this game! The tower combos are addictive, especially when you get the super monkeys going!"
"Not bad for an old Flash game! The upgrades are super satisfying, though I wish there were more maps."
"Honestly, it’s a bit repetitive after a while, but I can’t help but play another round just for the thrill!"
