Intellectual property attorney Stephen McArthur notes that
Atari v. Amusement World was the first of nearly a dozen rulings in favor of alleged
video game clones, "pav[ing] the way for developers to create games closely resembling established and successful games", with courts only shifting nearly 30 years later in
Spry Fox, LLC v. Lolapps, Inc. and
Tetris Holding, LLC v. Xio Interactive, Inc. Greg Lastowka states that the idea-expression dichotomy established in
Asteroids was difficult to apply in the
Spry Fox and
Tetris Holdings disputes from 2013. He compared the
Amusement World case to other early copyright cases, questioning "what made a video game involving spaceships and space rocks an unprotected idea", while contrasting it with the court in
Atari, Inc. v. North American Philips Consumer Electronics Corp., which gave copyright protection to
Pac-Man's "
pie-shaped gobbler and four ghost monsters as a particularized form of expression". Writing in 2018, Tori Allen says this case represents the rudimentary composition of early video games that made it difficult to discern between idea and expression, with video games progressing in their expression to allow more copyrightable game elements. == References ==