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Av. Barcelona, 105

Cubus Games is a team of app developers and gamebook enthusiasts based in Barcelona (artists, writers, musicians and developers) dedicated to delivering original interactive stories and digital gamebook apps. Its intelligent and in-depth choose-your-own-adventures all include original soundtracks, high-quality illustrations, and addictive challenges across a host of popular genres such as sci-fi, fantasy, horror and steampunk. Cubus Games: Play a book, and read a game. 

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Heavy Metal Thunder


english / catalan

The Invaders have taken everything from us...
except our free will

As humanity rose to its zenith and laid claim to the solar system, there were no celebrations, no cries of victory, no songs of conquest – there were only wry, sarcastic smirks and debates concerning how long it would take humanity to ruin the neighboring planets of the solar system.

They felt no need to rush, for they had already won the war… Or so they thought.

Then the Invaders came. Technologically advanced, hyper-militaristic, highly organized... they found in humanity a race bent over and begging to be conquered.  They devastated, annihilated, and set up their own system of rule. They took their time in destroying our off-world colonies.




Kyle B. Stiff

Sci-fi writer and gamebook designer, born again and again after one thousand deaths. Author of other book series such as Demonworld.

Learn more about the Entertainer  →


Marc González

Illustrator, graphic designer, musician, singer, writer… an ARTIST in capital letters.

Discover Marc's work →



"The whole thing is presented brilliantly. The skill check and fighting interface in particular makes tapping the screen to stop some dice feel surprisingly futuristic." -PocketGamer


"Heavy Metal Thunder can kill you off a few minutes in. It's an intriguing adventure gamebook." - 148 Apps


"It offers a wide array of features when it comes to delivering a fun and entertaining experience. (9.25/10)"



"This is a very solid gamebook, with plenty to see and a zippy pace, told through some bizarre, entertaining writing. " - Touch Arcade

"You’ll encounter beautiful artwork and captivating soundscapes that make the experience as real as possible. The gamebook also offers high replay value with its divergent narratives." -  App Advice

"Its art is absolutely fantastic (...) It's super atmospheric, and very well put together (...) I love the audio."
- App Spy

"If you’ve enjoyed playing Dead Space, reading “The Martian” by Andy Weir, or watching “Gravity” starring Sandra Bullock, you’re likely to enjoy playing, reading, and watching (in a manner of speaking) Heavy Metal Thunder." - AppAdvice