Bungie's sci-fi shooter (and sort of MMO) Destiny held an open beta this past weekend for all home consoles (PlayStation 4, PS3, Xbox One, and Xbox 360) simultaneously. It's an ambitious game for the team that created Halo, joined Microsoft, and subsequently split from the company to make this multi-platform game (signing a 10-year deal with publisher Activision Blizzard in the process). We talked with Polygon editor-in-chief Chris Grant for more on the impact of the beta, why Bungie left, and how important this $500 million project is for everyone involved.