From the piece:
Designing the rules system for The End of the World was a unique and fun experience for us. The roleplaying game line is based on an RPG made by our Spanish partners called El Fin del Mundo. When we began working with El Fin del Mundo, we faced the challenge of adapting the game for American audiences while staying faithful to the original vision of the game. The result is an elegant system that allows all types of players to tell stories in twenty different apocalypses that will be released across the four books that make up The End of the World roleplaying game.