Bounty is a 3 vs 3 game mode where kills are what matters. No objectives, aside from having more points than your opponent when the 2 minute 30 second round timer runs out. Points are obtained by killing enemy brawlers.
As you rack up the kills, your brawler becomes more and more wanted, earning an additional star for each kill obtained without dying. Brawlers become “Most Wanted” at 7 stars. When a brawler dies, however many stars he is worth will be awarded in points to the team that kills him.
Don’t get too confident if you’re in the lead, because quite often a team may dominate for the majority of the round. A key kill or two on high value targets can quickly even the score.