A browser game is a type of video game that can be played directly in a web browser without the need for additional software downloads. These games often use technologies like HTML5, JavaScript, and Flash to create interactive experiences. Players can access them on various devices, including computers, tablets, and smartphones. Many browser games are free-to-play and may include in-game purchases or advertisements. They cover a wide range of genres, from simple puzzles to complex multiplayer experiences. Popular examples include Agar.io and Slither.io, which allow players to compete against others online in real-time.