In May 2013, Nintendo announced it was collaborating with Sega to produce "Sonic" games for its Wii U and 3DS platforms. The first game in the partnership, 2013's "Sonic Lost World", was also the first "Sonic" game for eighth-generation hardware. "Sonic Lost World" was designed to be streamlined and fluid in movement and design, borrowing elements from Nintendo's "Super Mario Galaxy" games and the canceled "X-treme". The second was "Mario & Sonic at the Sochi 2014 Olympic Winter Games" (2013) for the Wii U, the fourth "Mario & Sonic" game and a 2014 Winter Olympics tie-in (see Crossovers section). The deal was completed in 2014 with the release of ' for the Wii U and ' for the 3DS; these games were based on the "Sonic Boom" television series (see Animation section). None of the games were well received; "Sonic Lost World" polarized critics, while critics found "Mario & Sonic at the Sochi 2014 Olympic Winter Games" mediocre and panned the "Sonic Boom" games. Nonetheless, "", a "Shattered Crystal" sequel, was released in 2016.