By the end of this year Nintendo will release its first game for smartphones. The developer announced a partnership with mobile company DeNA back in March, and more recently said that we'd see five games released by the end of 2017 as part of the deal, including one in 2015. "We aim to make each title a hit," Nintendo president Satoru Iwata said. The thing is, we have no idea what those games might look like. Nintendo still makes some amazing experiences, but some of its early forays into free-to-play, mobile-style games haven't been so great. DeNA, meanwhile, is best known for the terrible digital card game Rage of Bahamut. So what will happen when these two companies collide?