New features include having up to eight players fighting at a time on the Wii U version, support for Nintendo's line of Amiibo (being one of the first games to do so), using custom Miis as playable fighters, post-release downloadable content including additional fighters and stages, and customizable special moves. Melee and the slower, more casual-friendly Super Smash Bros. The gameplay was tuned to be between that of the faster, more competition-oriented Super Smash Bros. The games began development in 2012 and were announced at E3 2013. The games are crossover titles that feature characters, items, music, and stages from various Nintendo franchises, as well as from several third-party franchises. for Wii U are non-traditional fighting games where players use different attacks to weaken their opponents and knock them out of an arena. The Wii U version was released in North America, Europe, and Australia in November 2014 and in Japan the following month. The Nintendo 3DS version was released in Japan on September 13, 2014, and in North America, Europe, and Australia the following month. It is the fourth installment in the Super Smash Bros. and published by Nintendo for the Nintendo 3DS and Wii U video game consoles. for Wii U are 2014 crossover platform fighter video games developed by Bandai Namco Studios and Sora Ltd.