Bloons Monkey City: The Tower Defense City Builder Guide

By Nham Vu · Updated July 2026

Bloons Monkey City is Ninja Kiwi's spin-off that bolts a city-building layer onto the Bloons Tower Defense formula, and it still holds up as one of the more distinctive entries in the series. Instead of just placing towers on a fixed track and clearing waves, you're managing an entire settlement that expands building by building, with tower defense missions feeding resources back into your city.

I've put a lot of hours into the Bloons franchise over the years, and what stands out about Monkey City is how it forces you to think two steps ahead. You're not just optimizing a single defense layout, you're balancing which buildings to unlock, which special missions to run, and how to keep your monkey economy growing while bloons keep testing your defenses.

This guide breaks down how the core loop works, where you can actually play it in 2026, whether it costs anything, and the habits that separate a cramped, struggling city from a thriving one.

How Does Monkey City Work in BTD6 and the Original Game?

Bloons Monkey City runs on a two-part loop: you build and upgrade a city on a hex-grid map, then send monkeys into tower defense battles to earn resources that fund more construction. Ninja Kiwi released it in November 2013 as a standalone title, separate from Bloons TD 6, though both share the same monkey-tower DNA and much of the enemy roster.

In practice, your city produces resources passively over time (wood, ore, food and so on depending on which buildings you've placed), and you spend those resources both on new structures and on entering combat missions. Combat missions are short tower defense levels where you place a limited roster of towers to stop bloons, and winning grants city resources plus rare materials used for special buildings.

The building layer is the part that separates this from a typical TD game. Roads, farms, quarries, and monkey-themed structures all occupy hex tiles, and expanding your city border requires clearing away obstacles, which usually means running another combat mission first. It's a tight feedback loop, and it's the reason players who like base builders alongside tower defense tend to sink far more hours into this than into a standard Bloons title.

Is Bloons Monkey City Free to Play?

Yes, Bloons Monkey City is a free-to-play title on every platform it's available on, following the free-to-play model listed in its official genre tags. You can build your city, run missions, and unlock a large chunk of content without paying anything upfront.

Like most free-to-play games from this era, there are optional purchases for premium currency (usually called Monkey Money or a similar city-specific currency) that speed up construction timers or unlock cosmetic and premium buildings faster. None of that is required to actually finish the campaign content or enjoy the core loop, it just shortens the wait.

What trips up new players is expecting it to play exactly like a paid Bloons TD entry. Because it's free-to-play, expect timers on some buildings and a slower drip of premium towers compared to a game you buy outright.

Can You Play Bloons Monkey City on PC?

Bloons Monkey City is playable on PC through Steam and through Microsoft's app store, alongside mobile releases on Android and iOS. Ninja Kiwi's own listing also notes GeForce Now support, which lets you stream the game on PC hardware that wouldn't otherwise run it natively.

The Steam version gives you the full desktop experience with mouse-and-keyboard controls, which a lot of longtime tower defense fans actually prefer over touchscreen taps for precise tower placement. If you already have a Ninja Kiwi account from Bloons TD 6 or another title, progress and purchases are generally tied to platform rather than shared across every device, so check which storefront you're committing to before investing serious time.

For players asking about a browser-based Flash version, that's the game's original release format from years back. Flash support has been phased out industry-wide, so the supported way to play now is through the Steam, mobile, or Windows app store builds.

What Platforms and Versions of Bloons Monkey City Exist?

Bloons Monkey City is developed and published by Ninja Kiwi, with the initial release dating to November 25, 2013. The most recent build tracked for the mobile release sits at version 1.12.5, updated in September 2020, which tells you this is a mature, largely finished title rather than one still receiving frequent content drops.

The available platforms include the following.

The game sits within the Bloons Tower Defense series, so if you've played BTD5 or BTD6 you'll recognize the tower roster, the bloon types, and a good chunk of the humor in the writing.

• Steam (Windows PC)
• Android via Google Play
• iOS via the App Store
• Microsoft Windows app store build
• GeForce Now cloud streaming

What Tips Help You Build a Strong Bloons Monkey City?

Fast progress in Bloons Monkey City comes down to resource discipline more than combat skill, since a cramped or poorly planned city bottlenecks everything else. The best players I've seen treat their hex layout like a real economy: they don't just plop buildings wherever there's space, they cluster resource producers so bonuses stack and leave clear paths for future expansion.

Early on, prioritize buildings that generate the resource types combat missions demand most, since running out mid-campaign forces you to grind lower-value missions just to refill the tank. It's also worth clearing city border obstacles methodically rather than randomly, because some obstacles guard better tile layouts or rare resource nodes once removed.

A few habits consistently pay off.

Don't ignore special event missions either. They tend to reward rare materials tied to unique buildings that regular missions simply don't offer, and those buildings often unlock stronger tower boosts for your combat roster.

• Rotate through combat missions instead of replaying the same one, since resource rewards vary by mission type
• Keep at least one high-output resource building of each type running at all times
• Save premium currency for permanent unlocks rather than timer skips
• Expand your border early even if it costs more, since cramped cities cap your building options later

How Does Bloons Monkey City Compare to Other Bloons Games?

Bloons Monkey City trades the pure, wave-based structure of Bloons TD 5 and Bloons TD 6 for a persistent city you keep coming back to, which makes session length and pacing feel very different. Where BTD6 is built around discrete, repeatable maps with fixed difficulty tiers, Monkey City's missions exist mainly to fuel a longer-term building project, so the stakes of any single match feel lower.

That said, the tower mechanics, upgrade paths, and bloon variety will feel immediately familiar if you've spent time in the mainline series. Ninja Kiwi reused a lot of the combat DNA, they just wrapped it in a management layer borrowed from city-building games.

If you want pure tower defense with ranked difficulty and competitive modes, BTD6 is the better pick. If you like the idea of a base slowly growing while tower defense missions fund it, Monkey City scratches an itch the mainline games don't really touch.