New LEGO Hidden Side Game Theme Announced!

For fans of previous LEGO mobile games such as LEGO Fusion and Life of George, look no further–LEGO has announced a new Augmented Reality theme, Hidden Side!  The theme involves using your mobile phone to scan for “haunted points” in each LEGO set, which you then use to rebuild and change the set and expose more haunted areas.  Each set can transform quite a bit, and there are eight sets total, with four having pictures revealed.  LEGO is sure to reveal the four other sets this weekend at New York Toy Fair, so keep your eye out for them!  The pictures below come courtesy of The Brothers Brick and Engadget.


The first and cheapest set to look at here is 70418 Lab, with 174 pieces at a price point of $19.99 US and €19.99 EUR.  As you can see in the photo, the minifigures in this theme are incredibly detailed!  I am unsure if the hooded teenager minifigure appears in this set, as he appears in photos of other sets, particularly the Graveyard set.  However, this set does include a Frankenstein-esque minifigure with entirely new printed pieces.  It also looks as if there might be a new dog mold, which is quite awesome!  We can also see on the phone in this picture that there are bosses in the sets, hinting towards combat or other competitive features.



The second set here is 70420 Graveyard with 335 pieces at a price point of $29.99 US and €29.99 EUR.  This appears to be the “starter model” of Hidden Side, and is featured in most of the promotional pictures.  I don’t initially spot any new molds here, but given that Hidden Side sets feature many “hidden features” and secret compartments there’s a possibility there is some new stuff here.  The statue is rotatable and we see it being used in the Graveyard puzzles in the gameplay video below courtesy of The Brothers Brick.  In the second picture you can also see a second minifigure to the left.  It seems that LEGO is going for a “punk teen” style for the minifigures in this theme, and I’m sure we’ll get some really unique figures and pieces.


The third set to show up is 70423 Bus, with 689 pieces at a price point of $59.99 US and €59.99 EUR.  We don’t know much about this set so far but it looks pretty cool.  It’s awesome to see a LEGO school bus finally, and I love the techy feel of it.  I’ve seen some people mention that this set looks a lot like the Fortnite battle bus, which I certainly agree with.




The fourth set to be revealed and also the largest in the theme is 70425 High School with 1,474 pieces at $129.99 US and €119.99 EUR.  The three pictures above show various perspectives of the set, with the first showing the front, the third showing the back, and the second one showing the transformed version of the set after finishing the puzzles and finding the ghosts with the app.  The interior of the set is extremely detailed, but appears to be missing the most important feature of a school–a classroom!

There are also four other unannounced sets:

70419 Boat w/ 310 pieces, $29.99 US and €29.99 EUR

70421 Truck w/ 428 pieces, $39.99 US and €39.99 EUR

70422 Diner w/ 598 pieces, $49.99 US and €49.99 EUR

70424 Train w/ 689 pieces, $89.99 US and €79.99 EUR

Overall, all these sets are priced quite well, especially for a LEGO mobile theme, compared to how expensive Life of George and LEGO Fusion were.  Will you be buying any of the Hidden Side sets?  Let us know down in the comments!  You can check out the full press release below.

LEGO GROUP Introduces LEGO Hidden Side, Combining Building with Augmented Reality to Create a New Way to Play

NEW YORK (February 14, 2019) – The LEGO Group today unveiled LEGO Hidden Side, an augmented reality-enhanced LEGO play theme where kids must turn a haunted world back to normal, one ghost at a time. It is the only play experience available today that fully and seamlessly integrates augmented reality (AR) with physical construction to reveal a hidden world of interactive play. Developed for children 7 years and up, LEGO Hidden Side is showcased to buyers, media and influencers for the first time at American International Toy Fair Booth in Booth 1335 of Hall 3B at the Jacob K. Javits Convention Center, February 16 -19.

LEGO Hidden Side includes a series of eight “haunted” building sets full of awesome functionality and secret surprises that, on their own, provide the build and roleplay fun of any LEGO play theme. Activating the bespoke AR app developed together with the theme brings the models to life, revealing a hidden world of interactive mysteries and challenges to solve. When combined, the two worlds make each other even more compelling and fun.

“Our years of experience pioneering the convergence of technology and physical play have taught us that kids expect exciting play experiences that move seamlessly between physical and digital worlds – something we call fluid play,” said Tom Donaldson, senior vice president, Creative Play Lab at the LEGO Group. “At our core we focus on tactile building, but AR presents opportunities to enhance physical LEGO play with new action and mastery elements. We’re breaking the mold of gaming-first AR play experiences to create a new type of play where the physical world actually influences the AR layer, instead of the other way around.”

Core LEGO Building Experience

LEGO Hidden Side building sets deliver everything kids love and expect from a LEGO building experience – the challenge of the build, a detailed model with functionality, and minifigure characters set in a story-driven universe. Each model can be built as it appears by day – a school house, bus, or graveyard, for example – and has transforming functionality to become the haunted version of itself.

Truly Augmented Play

The app lets kids assume a first-person perspective and play together with the two characters – Jack and Parker – as they explore their hometown of Newbury, using their mobile phones to see and solve paranormal mysteries beneath the surface of their environment. Game play prompts kids to hold their phone up to the physical LEGO models and interact with various elements, or “points of possession,” which release virtual ghosts that kids must then capture in the AR game to stop the haunting. Numerous scenarios create dynamic gameplay that requires kids to keep one hand in each world to progress the play.

Donaldson added, “As we have designed LEGO Hidden Side, physical manipulation of the LEGO models alters the AR experience, and the AR experience prompts new things to discover in the physical models, creating a deeply engaging reciprocal play experience in two worlds that has never been seen before.”

The app also consists of a digital game that kids can play independent of the building set. After launch, the app experience will continue to expand with the addition of new ghosts, new game challenges, and randomization of gameplay so the experience is different every time kids play.

Donaldson noted, “We’re leveraging some of the best elements of mobile games to keep the experience fresh, encouraging kids to return to their LEGO sets time and again to see what is different. With the thoughtful integration of LEGO building and AR technology, we can deliver a truly innovative play experience that taps into the ever changing landscape of fluid play, where children constantly find new moments and forms of play.”

LEGO Hidden Side will be available globally in late summer 2019. The LEGO Hidden Side app will be a free download from the App Store and Google Play.

For more information, visit

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Written by: Béla Kurzenhauser

Béla is a writer at and has been a fan of LEGO Games since 2009. He's an aspiring game developer currently working on his computer science degree and likes to spend his time reading the newest comics, watching films, playing the latest games, or hanging out with his cat.