Its exact position varies depending on what metric you use to measure success, but the PC MOBA League of Legends is certainly a contender for biggest game in the world right now.

It's significant, then, that its developer Riot Games has made its first foray into mobile game development. 

The game in question, far from the MOBA complexities of League of Legends, is Blitzcrank's Poro Roundup - a pixel-art spin-off starring LoL behemoth Blitzcrank - now available on the App Store and Google Play.

Blitzcrank's Poro Roundup is evidently more about exposure than revenue, going one further than Fallout Shelter by completely eschewing IAPs.

There's also a sense that Riot Games is aiming for some level of exclusivity, with the game set to be removed from the App Store on 21 September. 

Regardless, it will be interesting to see how mobile factors in to Riot Games' ongoing strategy, and whether or not this serves as a foot in the door to something bigger.