Brawl Stars is a multiplayer online battle arena and hero shooter designed for mobile devices. Players choose from over 100 unlockable characters called Brawlers, each with unique abilities and playstyles, and compete in various objective-based game modes including team deathmatch, gem collection, soccer-inspired ball games, battle royale, and a MOBA-style lane mode. Matches are short, typically lasting under three minutes. The game also features a ranked competitive mode and a map editor that lets players create and share custom arenas.

The events of Brawl Stars unfold within Starr Park, a fictional amusement park that was abandoned in 1995 after a catastrophic incident. Mysterious purple gems discovered at the site granted immortality to several staff members and visitors, but the resulting chaos also brought inanimate objects to life and mutated the local plant life and animals. The park's former inhabitants, now transformed into superpowered Brawlers, continue to clash within the ruins of the once-cheerful attraction.