The biggest game in the world right now, "Fortnite," is available on pretty much any device you can find. You can play it on PC or on a Mac, on Xbox One or PlayStation 4 — it's even coming to iPhone and Android in the near future. Better yet, you can play the online-only, multiplayer game across platforms. If I'm playing it on PC, and you're on PlayStation 4, or your phone, we can play together. There's just one exception: PlayStation 4 and Xbox One players can't play together.