Video game clone grouped as "Myst clones". Some video game genres are founded by archetypal games of which all subsequent similar games are considered derivatives; notably, early first-person shooters were often called ""Doom" clones", while the success of the open-world formula in "Grand Theft Auto" led to the genre of GTA clones. The genre of endless runners is based on the success and simplicity of the game "Canabalt". In these cases, games that are "clones" of another are generally not implied to have committed any intellectual property infractions, and otherwise considered legally acceptable practices, although calling such games clones is generally considered derogatory.
Emergency (video game series) Emergency (video game series) Emergency is a series of rescue simulation video games by German developer Sixteen Tons Entertainment and creative director and founder of the series Ralph Stock. The first game in the series, , was published by TopWare Interactive in 1998. Emergency 2 was published by Take 2 Interactive in 2002, who would continue on to publish both Emergency 3 in 2005 and Emergency 4 in 2006. As of 2010, Deep Silver controlled publishing operations of the Emergency series and its spin-offs. In the games, players take control of emergency services, including fire and ambulance services, police, and