

Challenge mode takes those Career levels and adds a never-ending string of challenges (as the name implies), and Sandbox mode lets you build without limits, while Franchise mode lets you create a series of connected zoos that span the globe. The career mode takes you on a worldwide tour across 12 levels, putting you at the heart of a dramatic story as it asks you to complete a variety of different objectives to proceed. There are four game modes on offer, which, when combined, create more content that you might ever be able to play.

It's a complicated process, and Planet Zoo has a steep learning curve as a result, but the more you play, the easier it becomes to understand – to a point, at least.
