Ubisoft's multiplayer shooter XDefiant has officially closed down, and its game director, Mark Rubin, is leaving the gaming industry.Rubin pointed out that the game received little to no marketing support from Ubisoft and lacked post-launch resources to succeed.Despite the marketing shortcomings, XDefiant had a fast acquisition of players in its initial weeks, largely due to word-of-mouth promotion.Mark Rubin expressed gratitude to the fans for their support and mentioned the passion of the development team in a social media post.