Retro 8-bit video game-like adventure with Cache Cat battling enemies, bosses, and classic video game hazards to earn and steal Gems! The fight for justice to rid the world of evil begins with you and your friends! Join our hero. Conquer the hazards. Defeat the enemies. Obliterate the bosses. Get the Gems! Take turns presenting each other with classic video game challenges, always putting a Gem as a reward at the end. Play with or against your friends, or even the 'computer!' Learn the depth of the subtle strategies in Gem Runner, and emerge victorious! Presenting a challenge involves chaining elements together and trying to make the most difficult obstacles to overcome. Playing against a challenge involves matching an element or a game mechanic (e.g. punch, jump, etc.) with what is required for each challenge. There are 4 heroes, each with their own deck (sold separately) that include all unique hazards, enemies, and bosses. Decks can be played together to expand the number of gems collectable per player, and add some unique gameplay. —description from the publisher