Gemstone Guardians is a tower defense game where selection and combinations are key. Choose your towers and make powerful combinations to try prevent the enemies from reaching the end portal.
Each round you will be able to build five towers at random to help you defeat the incoming wave of enemies. You must select one of the five towers to be used and the rest will turn to stone. These towers can be strategically placed to help maze enemies away from there desired destination.
Each kill you get will grant you gold which can be used to increase the chance you will get higher quality towers in the following rounds. You can also use your gold to increase the chance of getting a certain tower type each round. This can be used to try build specific special towers.