Gunball 2: Emperor's Revenge is the sequel to Gunball Arena. You're a highly customizable ball that can wield various guns, swords and equipment. These items aren't free, so you'll need to earn money from battles. Destroy enemy balls and collect coins, which will be added to your bank if you win the battle. Equipment can be purchased in the shop or earned by defeating bosses. In addition to earning money and items, you'll also gain experience, and when you level up, you'll get points to spend on skills.