Z/X (ゼクス, Zekusu), also known as Z/X Zillions of enemy X, is a collectible card game produced by Nippon Ichi Software and Broccoli. It is marketed as the first "free" collectible card game, with a free deck offered to players at card shops and events in Japan. A PlayStation 3 game titled Z/X Zillions of Enemy X: Zekkai no Crusade, developed by Nippon Ichi Software and produced by Broccoli was released in Japan on May 23, 2013.