What was the gameplay idea behind Battle Towers?

A tower-defence game in the LEGO Fusion app, where towers you built and scanned defended against digital creatures.

Why does the set have so few distinct parts?

Because the towers needed to stack and combine in a modular way for the app's scanning system, which works better with repeating basic shapes than lots of specialist pieces.

Does the companion app still work?

No, the app has been discontinued, but the physical towers can still be built and reused.

Fusion

Battle Towers

Battle Towers (21205) was part of the same 2014 LEGO® Fusion range as Create and Race, but built around a tower-defence game instead of racing. With 212 pieces, 45 distinct parts and no minifigures, the focus is entirely on the fortified structures rather than characters.

Set number: 21205
Year: 2014
Pieces: 212
Minifigures: 0
Theme: Fusion
Different parts: 45

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 45

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Description

A tower-defence game you could actually build

Battle Towers took the same LEGO® Fusion idea as Create and Race – build something physical, scan it, and watch it come to life in an app – and applied it to a completely different genre: tower defence. Instead of vehicles and race tracks, this set is about constructing fortified towers that could then be scanned and deployed against waves of digital creatures inside the companion game. It's a good example of how varied the individual Fusion sets were despite sharing the same underlying build-and-scan mechanic.

Fewer part types, more repetition

At just 45 distinct parts across 212 pieces, Battle Towers has a noticeably narrower range of element shapes than you'd expect for a set this size. That's a direct result of the modular design the app needed: towers had to stack, combine and reach different heights and configurations so the scanning system could recognise them reliably. Relying on a smaller set of repeating basic shapes rather than lots of specialist parts is what makes that flexibility possible.

A fantasy palette, not a technical one

Where other Fusion sets lean towards a neutral, technical colour scheme, Battle Towers uses light bluish grey, tan, reddish brown and dark green – a palette that reads much more like stone, wood and foliage than a race track or a city plan. That earthier colour choice fits the fantasy tone of a defence game built around towers and creatures, and it sets the set visually apart from the more vehicle-focused entries in the same range.

Bricks that outlived the app

The app that turned Battle Towers into an actual game has long since been shut down, but the 212 pieces still work well on their own as building material for fortresses, watchtowers or other fantasy structures. The earthy colour palette and modular basic shapes in particular make them easy to combine with castle or landscape sets. The full parts list on this page shows exactly which bricks, plates and colours are included, useful if you're hunting for reddish brown or dark green pieces specifically.

FAQ

What was the gameplay idea behind Battle Towers?: A tower-defence game in the LEGO Fusion app, where towers you built and scanned defended against digital creatures.
Why does the set have so few distinct parts?: Because the towers needed to stack and combine in a modular way for the app's scanning system, which works better with repeating basic shapes than lots of specialist pieces.
Does the companion app still work?: No, the app has been discontinued, but the physical towers can still be built and reused.

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