On the site, it currently says you can install the EasyRPG player using Homebrew with this command:
brew install homebrew/games/easyrpg-player
However, this will result in an error message as
homebrew/games has been removed. Homebrew very unhelpfully doesn’t say what you should do instead, which is simply to type
brew install easyrpg-player - I recommend that the install page be updated to reflect this change.