Minigames occur variously as gameplay features, or as time fillers while levels are loading, or as Easter eggs even in non video games e.g. a DOOM-like game or a flight simulator in different versions of Microsoft Excel. In the latter case, they are often called "secret games". In the former case, the successful completion of such minigames may or may not be required to finish the encompassing game. They are often included as extra content to use once the main storyline is completed. Minigames occur also on other forms of hardware e.g. on a dot-matrix display of a pinball machine or even as time filler on a traffic light e.g. StreetPong.
Some games, such as the WarioWare series (which are called microgames in the game), Universal Research Laboratories's Video Action, some Cinemaware titles like Defender of the Crown, David Whittaker's Lazy Jones or the smartphone satire Phone Story are made up of many minigames strung together into one video game. Some similar games, such as Nintendo's Mario Party series, are considered party games, specifically developed for multiplayer. In party games, minigames usually involve performing an activity faster or collecting more of a specified item than other players to win.