Based in Cambridge, Massachusetts

Release date:
August 28, 2014

Apple App Store
Google Play Store


Regular Price:

Free (really!)


Bond Breaker 2.0 places you in the world of the extremely small - where you need to manipulate protons, molecules, laser light, and more to solve challenging levels. Push and pull atoms around, combine them, split them, all while avoiding obstacles. Built as a collaboration between scientists at the CaSTL research center and indie studio TestTubeGames, the game brings the joys and frustrations of physical chemistry to players of all ages. The game is out on iPhone, Android, and the web, and as always is completely and utterly free.


With more chemistry content and improved levels, the team is hoping Bond Breaker 2.0 can reach even more players. "Our target audience is everyone from people with an interest or background in science to people who like fun, or both..." says Andre Schirotzek, managing director of the Center for Chemistry at the Space Time Limit (CaSTL), a research group at UC Irvine. The wide accessibility of the game, however, doesn't mean the science isn't robust. "The mission of CaSTL, making a movie of an individual molecule as it undergoes a chemical reaction, requires cutting edge technology and science concepts," Andre continued. "Believe it or not, you will find many of them in the game." Indie developer Andy Hall of TestTubeGames was glad to take on the challenge of pairing rigorous science and gameplay. "With a background in both physics and games, I'm always looking for ways to combine the two in interesting ways." Bond Breaker is based on an accurate simulation of chemistry at tiny scales, with atoms and molecules behaving appropriately. "By playing the game, you're really doing a hands-on experiment. That means whether you're an elementary school student or a PhD candidate, you'll be able to engage with and learn something from the game."


  • Over 100 challenging chemistry puzzles
  • Based on REAL SCIENCE. Because, hey: science is awesome.
  • No background knowledge required
  • Be Hydrogen. Or Oxygen. Or Helium!
  • Lasers, Muons, Tunneling Microscopes, and a whole lot of Electric Forces
  • Finally learn how to be a proton, like you always wanted.


Bond Breaker Trailer YouTube


download all screenshots & photos as .zip (4MB)
CaSTL logo.png

download logo files as .zip (564KB)

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CaSTL Research Group
The scientists tinkering in the labs who are behind the creation of this game castl.uci.edu.

Blog Post
The blog-post through which this game was released is available at testtubegames.com.

About TestTubeGames

TestTubeGames is an independent games studio based in Cambridge, Massachusetts. Andy Hall founded the studio in 2011 with the mission of bringing theoretical physics to games. He works from the ground up, trying to find the fun, interesting puzzles in a subject. Then he adds in cute animals, slaps in several dozen puns, and goes into a cave for several months of devoted meditation to come up with the titles.

More information
More information on TestTubeGames, our logo & relevant media are available here.

Bond Breaker 2.0 Credits

Andy Hall of TestTubeGames
Development, Design, and Art

Andre Schirotzek
Scientist, CaSTL at UC Irvine

presskit() by Rami Ismail (Vlambeer) - also thanks to these fine folks