The game engine, which is available in a beta build, is free of charge, and there is neither a subscription fee nor revenue-sharing model to bar entry to small development teams. The terms of service typically prohibit the use of the development tools “with life-critical or safety-critical systems, such as use in operation of medical equipment, automated transportation systems, autonomous vehicles, aircraft or air traffic control, nuclear facilities, manned spacecraft, or military use in connection with live combat.” In short, Lumberyard is meant to be a video game development platform, not something for creating, testing or using with real-world situations or critical systems. But clause 57.10 makes the following exception: “However, this restriction will not apply in the event of the occurrence (certified by the United States Centers for Disease Control or successor body) of a widespread viral infection transmitted via bites or contact with bodily fluids that causes human corpses to reanimate and seek to consume living human flesh, blood, brain or nerve tissue and is likely to result in the fall of organized civilization.” The clause was first noticed and shared on Twitter by writer and podcaster, Diane Patterson and the tweet has since been retweeted thousands of times. In the end, it is up to you to decide the chances of that actually happening, and if it does, you can use Lumberyard for whatever you please when there’s a zombie apocalypse!