Bloons Tower Defense 4: Expansion

Bloons Tower Defense 4: Expansion is the ultimate add-on for fans of BTD4, packing in more bloon-busting chaos with brand-new tracks, towers, and a fresh game mode. This standalone Flash expansion introduces the powerful Dartling Gun and Spike Factory, plus four unique maps like Sandy Spiral and Monkey Temple. Add in Deflation mode and Tower Specialties, and you’ve got a strategic challenge that’s as tough as it is addicting!

How to play Bloons Tower Defense 4: Expansion

This expanded version of BTD4 offers new layers of challenge and customization. Here’s how to dive into the new content and dominate the bloons!

Objective

Place towers along the path to prevent bloons from escaping. Earn cash by popping bloons (except in Deflation mode!) and use it to build, upgrade, or strategically adjust your defense. Survive all the waves in your selected mode to win.

Controls

• Desktop (Keyboard & Mouse): Use the mouse to select and place towers. Click to upgrade or sell, and use spacebar to speed up rounds or activate abilities.
• Desktop with Controller: Limited Flash emulator support may allow controller input via virtual cursor. Setup may vary.
• Mobile: Tap and drag towers to place. The Flash UI is touch-compatible but works best on larger screens or tablets.

New Towers

• Dartling Gun: Fires continuously in the direction of your mouse cursor. Powerful but requires constant targeting attention.
• Spike Factory: Automatically drops spike piles at the end of the track. Great for backline defense or as a bloon insurance policy.

New Tracks

• Sandy Spiral: A looping path with long sightlines—perfect for long-range towers.
• Subterranean Sewers: Tight turns and tricky visibility challenge your placements.
• Monkey Temple: Aesthetically stunning, but deceptively difficult.
• Triangle of Insanity: Pure chaos. Fast tracks and limited space make this one of the toughest BTD maps ever.

Deflation Mode

Start with $50,000, but you won’t earn any money during the game. Plan your loadout carefully—what you build at the start is all you’ve got!

Tower Specialties

Unlock these by completing new tracks on various difficulties. Specialties reduce the cost of one tower type while increasing others, allowing for hyper-focused strategies.

FAQ

What is the difference between BTD4 and BTD4: Expansion?

The Expansion adds four new tracks, two new towers (Dartling Gun and Spike Factory), a new Deflation mode, and Tower Specialties for enhanced strategy customization.

Do I need BTD4 installed to play this expansion?

Nope! It’s a standalone Flash game. You can play it directly on PEXY.IO without needing the original BTD4.

Can I still save progress or use premium content?

Saving to a Ninja Kiwi account and premium purchases are no longer supported. Local browser saves may still work if cache isn’t cleared.

What’s the best strategy for Deflation mode?

Invest in towers with high longevity and area control. Think Super Monkey + Village, Bomb Towers, and Ice Towers for synergy. Don’t overspend early—balance is key!

Is this version mobile-compatible?

It works in most mobile browsers, but due to Flash-based controls, it’s best played on desktop or tablets with larger screens.