Crystal Cave Sort

Crystal Cave Sort replaces tubes of water with crystal tunnels full of gemstones. The rules will be familiar if you have played a water sort game: select one tunnel, pour its gems into another, and keep going until each tunnel holds a single type of gem.

There is a fair amount of structure around that. The game has 200 levels spread over eight cave worlds, and the gems include ruby, sapphire, emerald and amethyst among others. Levels can be played at Easy, Medium or Hard difficulty, and each one awards up to three stars. Gem coins are earned as you go, and tunnel themes become available too, although the developer does not tie the two together explicitly. Progress is saved, so you can leave and return without losing your place. The setting is a glowing crystal cave, drawn in a wide landscape frame.

Tap a crystal tunnel to choose it, then tap a second tunnel to pour the gems across. Match colours as you go. When every tunnel contains only one gem type, the level is won and you can carry on through the cave worlds. Pick Easy, Medium or Hard to set the difficulty that suits you.

Three stars are on offer for each level, so a cleared level may still have stars left to earn. If a cave world feels too demanding, the Easy, Medium and Hard settings let you adjust. Because progress is saved, there is no need to finish a world in one sitting.

A gem sorting puzzle on water sort lines, played by tapping. There are 200 levels in eight worlds, three difficulty settings, three-star ratings and saved progress. The cave fills a wide landscape frame.

Water Sort Legend has the same three difficulty settings and its own coin system across more than 150 levels. Kitchen Sorting also swaps liquid for solid pieces, sorting cooking ingredients into glass jars.