The Game Browser was one of the Play Modes in Overwatch, accessible through the right menu in the Arcade. In Game Browser players can choose to either create their own custom game, or find and join another player's game. Game Browser was replaced by Custom Game play mode in Overwatch 2.
Finding a game
Players can find public games through the list of game lobbies.
Creating a game
Players have a wide range of options to tweak to customize their game's settings.