Edge:Microsoft’s launch line-up for the Xbox One is awfully stabby. At a preview event in London last week, I wandered from stall to stall, checking off hands-ons and interviews with the triple-A titles like Dead Rising 3 and Ryse, but on the list of interviewees there was a game that I’m now quite embarrassed to say I’d never heard of. Zoo Tycoon? What’s that, a game about stabbing lemurs? Kicking penguins? Pulling the wings off an eagle?