How does Tap4Fun go from being a worldwide top developer based in China to even higher heights? Not just by creating a game that's bigger than any that Tap4Fun has made, but by making something bigger overseas than any game to ever come from China. That is the clear purpose with Tap4Fun's latest and most ambitious game, titled Invasion. Here's the story behind the effort to make a global Top 30 game from the little-known city of Chengdu, China.