iPhone Screenshots


ReactionLab 2 is a critically acclaimed 8-bit particle sandbox inspired by ‘Falling Sand’ and ‘The Powder Toy’.
Let your inner mad scientist shine by drawing elements onto the canvas and watching them interact in real time. Featuring 80+ elements, hundreds of different particle types, and nearly 140 achievements to attain. There are endless creative possibilities and undiscovered combinations. Try to find every reaction, or just build something awesome; it's up to you!

- Massive reactions list and over 80 elements.
- Freely pause and rewind time.
- Zoom tool with minimap.
- Save creations locally or share them with others online.

Eraser, Concrete, Steel, Water, Fire, Electricity, Ice, Wood, Plant, Snow, Wax, Plastic, Acid, Vinegar, Baking Soda, Lava, Rock, Dirt, Coal, Sand, Glass, Uranium, Salt, Potassium, Phosphorus, Caustic Gas, Chlorine, Steam, Neon, Radon, Hydrogen, Propane, Oil, Gasoline, Nitroglycerin, TNT, Fusion Bomb, EMP Bomb, Fuse, Steam Turbine, Battery, Electric Pump, Heating Coil, Torch, Drain, Crystal, Aerolucent, Aqualucent, Black Hole, Force Field, Plague, Anti-Matter, Plasma, Life, Clone Emitter, Dry Ice, Sulfur, Ray Emitter, Thermocouple, Vanish Barrier, Oscillator, Fan, Sludge, Unobtainium, Sponge, Electrode, Ivy, Spores, Insects, Iron Filings, Magnet, Sapphire, Mirror, Soap, Switch, Radiation Converter, and Cement.

ReactionLab 2 does not use in-app purchases and does not show ads. New elements and reactions are added with updates, they will never cost extra.

iPhone 5 / iPod Touch 5th gen. (iPad 3rd gen. / iPad mini 2) or newer recommended for best experience.

Official website: http://reactionlab.hforsyth.com

Follow ReactionLab 2 on Twitter: @ReactionLab2

Found a bug or have a suggestion? Email: hunter@hforsyth.com

What's New

Version 1.1.0

- Added 12 new elements and 21 new reactions.
- Performance improvements.
- Minor bug fixes.

Ratings and Reviews

Custom Elements


Really fun app to use. Would love to see Unlimited custom elements so we can create our own elements please :)

Super creative game!


Love this game, it really is amazing what you can create. Highly recommended!


Hunter Forsyth
14 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 2015 Hunter Forsyth


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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