In Boson, you are in control of the "Massive Particle Accelerator" or MPA, a machine built to discover the hidden secrets of the atomic universe. To stay stable and prevent a nuclear meltdown, you have to control which particles enter the MPA Portal and which do not.

The MPA changes colour to correspond to the colour of the particle it needs next. You need to allow as many of this colour particle into the Portal as possible, while destroying any particles of the wrong colour.

As you play, the speed and number of particles increases gradually, testing you to your limits of concentration and dexterity. If you let any of the wrong colour particle through, it will slowly break down the MPA Energy Field until it can't contain the reaction, and the MPA goes Nuclear!

There are different types of bonus particle which have special functions to be collected - so make sure you get them before they disappear - as well as loads of Game Centre Achievements to win along the way. Watch out for the Anti-Matter particles though, they can make the game much harder in a number of different ways!