- No ads, no in-app purchases, only FUN!
- 100% free! UNLIMITED levels, UNLIMITED hints.
- Carefully designed and sorted levels to help relax and exercise your brain at the same time.
- Works completely offline.
- Very simple and easy to understand rules.
- Undo a step or restart the level whenever you feel necessary.
- Get a hint whenever you’re stuck.
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Story:
Dr. Anonymous has captured millions of dinosaurs for his experiment. Neutralize liquid chemicals and free the dinos!

Acidic liquids (marked with -) and Alkaline liquids (marked with +) are harmful to the dinos, but once they are combined, they become harmless.
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Rules:
Liquids of the same color and same property (acid, alkali, or neutral) can not be combined, but they can be added on top of each other.
Liquids of the same color but opposite properties can be combined.
Each container (stack) can store at most 4 blocks of liquids. Once it’s full, no more liquid blocks can be added.
Once two liquid blocks of the same color but opposite properties are combined, they become one harmless liquid block.
Goal: neutralize all liquids above all the dinos.
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Controls:
On the main screen:
- Switch on/off sound.
- Switch on/off vibration.
- Read the game information.
On the game screen:
- Restart: restart the level from the beginning.
- Undo: undo one or more steps.
- Hint: Get a hint whenever you’re stuck.
Note: hints are only available if the level can still be solved.
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Info:
Please note, the game is completely free with no ads or in-app purchases. You can also undo as many steps as you want and use as many hints as you need. Everything is free.

To support the developer, please recommend the game to your family and friends. If you have any good suggestions, please don’t hesitate to let us know (sortingpuzzle@dong.digital).

Thank you very much!

Sorting Puzzle: Save the Dinos