There are several categories of browser games that are played out in a variety of different settings. Browser games usually fit one of several varying themes, which include fantasy, farming, mafia, war, underwater, animals and more. They are played out across numerous ages including the Stone Age, the ancient world, the middle ages, the modern ages, the present and the future.

The primary categories of browser games include strategy games, fun games, 3D games, role-playing games, simulation games, sport games, manager games, action games and racing games. Each of these genres provide varying challenges, tasks and quests for players. Strategy browser games involve players expanding and building up cities or empires using tactical skills. Role-playing games put players in the role of a certain character, usually exploring mysterious lands and completing missions, and manager games put players in charge of their own sports team.

Browser games are usually given a rating which suggests the game’s suitability for certain age groups. Some games will contain graphic or violent scenes and should only be played by adults, whereas others are suitable for players of all ages.