Both Riot Games' logo and name will make more sense in the future apparently since Tom Cannon announced a new fighting game that the studio is developing. Both the fist and the plural of "games" will look better once the game comes out.
Radiant Entertainment used to be a developer studio that had a fairly anticipated fighting game in the works, called Rising Thunder. It featured fights between robots rather than the usual, mostly humanoid, live beings that we are used to.
The studio sort of closed up in 2015 though since Riot Games acquired them and Rising Thunder was cancelled but some of its assets were reused later on. For example, PROJECT Jhin skin in League of Legends bears a striking resemblance to Rising Thunder's Crow, both in the looks and the walking animations.
More importantly, Rising Thunder Community Edition was released in 2018 as open-source and that was all the fighting games from Radiant so far, until EVO 2019.
Tom Cannon, the CEO and founder of Radiant Entertainment was interviewed during the event and officially that the studio is now developing a new fighting game for Riot Games. He was well aware that this was "probably the worst kept secret in the universe" since everyone expected something like this to be announced down the road.
Cannon did not, however, confirm nor deny whether the new game would be set in League of Legends' universe by the time of writing this article.
On the one hand, it would be logical since Radiant would already have resources for almost 150 champions at their disposal but keep in mind that not all of them are melee brawlers. It would be interesting to see their take on ranged champions being put in a fighting game though.
Whatever turns out to be the case, it will be good for Riot Games. First of all, they will finally justify their name since they will have more than one game (Teamfight Tactics is currently regarded as a game mode within League of Legends). Second, that iconic fist in Riot's logo will definitely look good next to a fighting game.