Over the last seven years or so, Fortnite has grown from a simple battle royale, to an entire platform in and of itself. Now, Fortnite isn't just home to Zero Build and Battle Royale, but a wealth of extra game modes, including a kart racer, a Rock Band-like rhythm game, and the Minecraft-like survival mode LEGO Fortnite, all of which are available for no extra charge. But those modes wouldn't have seen the light of day if Fortnite wasn't such a global hit to begin with, and a good deal of that success is tied to its countless number of collaborations.