Recently, the story of the game-service Anthem came to an end. However, not everyone accepted the closure of the servers.
And799 presented the results of his experiment — he was able to launch the BioWare shooter on an unofficial server:
This is just a proof of concept [prototype] created as part of my research and experiment. It does not reflect the current progress of work on a private server or a game revival project.
Some players would like to have an official offline mode for Anthem, but the developers did not provide it (and there have been no such announcements yet).