There are hundreds of characters that you can unlock in Battle Breakers, but getting them all is definitely not easy. However, you will be rewarded with various heroes for completing specific stages in the game, reaching specific levels or as various daily rewards. You can also unlock heroes from the Shop, which will basically be the easiest (although most expensive) way to get heroes: spend diamonds to get them, purchase a Premium Pass to receive them as various rewards... there are lots of options there. You will also get some chances via the special events in the game, or from the Skybreaker which will reward you with heroes when you reach certain milestones on each map. IMPORTANT: Unlike most other games of its kind, Epic Games' title will usually let you choose your hero out of three options. This offers a massive advantage, as you can select one that better suits your team and can fill gaps in your current setup. So make sure to always take advantage of this and when you're offered a choice, check all options out and decide which one would be the best for you.