Showdown is a single player kill oriented game mode of brawl stars.  It features 10 teams of one with the sole objective to be the last brawler standing.You can collect elixir from crates or by killing enemy players.  If the enemy player a brawler killed has a lot of elixir, the dead brawler may drop more than one elixir.  The more elixir you have the stronger you get and an increased likely hood you will win games.  You do not need to place first in order to gain trophies though. My favorite brawlers to play in this game mode are Bull, Shelly, and El Primo. The maps are symmetrical.