Bloons TD 4 Unblocked — Play Free Online

Bloons TD 4 marks the major turning point in Ninja Kiwi's iconic tower defense series. First launched in 2009, this entry completely revamped the visual style and introduced a progression system where popping bloons earns player rank, unlocking advanced defenses, new tracks, and game modes as you level up.

Every match challenges you to stop waves of colorful bloons from reaching the track exit. You start with basic dart monkeys and tack shooters, carefully placing them along curves and intersections. As rounds get tougher, you expand into specialized units like mortars, monkey aces patrolling the sky, ship buccaneers in water zones, and economic banana farms to fund late-game firepower.

For fans visiting Bloons TD, the fourth game represents the definitive classic era of the franchise. It introduced the dreaded MOAB (Massive Ornary Air Blimp), turning late-game rounds into frantic battles that test both your single-target burst damage and crowd-control coverage.

How to play

Select a difficulty level and track from the main menu. Click or drag tower icons from the right-hand shop panel onto open grass or water tiles on the map. Green outlines indicate valid placement, while red outlines show blocked terrain.

Click any placed defender to open its status card. Here you can inspect its firing radius, purchase tier upgrades, sell the unit for partial cash back, or adjust targeting priority between First, Last, Close, and Strong. Press Start Round to unleash the wave, and use the fast-forward button to speed up the action once your defenses are secure.

Defense tips

• Prepare for special bloon types: Lead bloons shrug off normal darts and require explosive cannons or mortar fire. Camo bloons slip past standard towers unless you deploy camo-detecting upgrades or radar support.
• Build farms early: Placing Banana Farms during early, manageable rounds yields steady bonus cash that makes buying costly Super Monkeys much easier later in the game.
• Optimize track choke points: Position tack shooters and glue gunners at tight bends or overlapping loops where bloons spend the maximum time within weapon range.
• Configure target priority: Set high-damage, slow-firing units like bomb towers and snipers to Strong so they crack tough bloon layers while fast attackers clear the swarms.

Similar games on Bloons TD

If you want to experience the roots of the series, Bloons TD and Bloons TD 3 deliver straightforward retro defense with earlier mechanics. Players looking for additional challenge maps and custom tracks can jump directly into Bloons TD 4 Expansion. If you want a fantasy lane-defense game with mana towers and dungeon traps, Cursed Treasure 2 is another standout strategy favorite on the site.