2XKO, Riot Games’ free-to-play tag-team fighting game set in its League of Legends universe, has struggled to find a sustainable audience since arriving in January. Those troubles have finally come to a head; come December, the developer will cease active development of the game.In a blog post, Riot states, “Over the last few months, we’ve been monitoring 2XKO’s trajectory closely, and what we’ve seen is painting a clear, consistent picture: while a lot of you jumped in to try the…