Nintendo's consoles -- Wii U and 3DS -- continue to be a hard nut to crack for video game developers trying to sell M-rated games. Such is the frustration that Ubisoft has given up the pursuit, deeming the Wii U unworthy of more mature games. Watch Dogs will be its last M-rated game on the family-oriented gaming console, meaning no Wii U version of Assassin's Creed Unity. "[Watch Dogs] is coming to Wii U... It will be the only mature game we publish on it," Ubi executive Yves Guillemot said in an interview with GameInformer. "What we see is that Nintendo customers don't buy Assassin's Creed. Last year, we sold in very small numbers." If you haven't already, read our review of Watch Dogs for the PS4 and Xbox One The French developer will instead focus on casual, family-friendly games, a market the Wii U caters to very well. In fact, its rhythm game Just Dance has been selling well on the console. "They are very interested in Just Dance, very interested by other kinds of games. So what we are trying to do is to focus more on the types of games they are interested in," Guillemot added. In a nutshell, Nintendo fans shouldn't expect to see any additional mature games from Ubisoft. Does this disappoint you?