Arena and Swarm have been massively successful endeavors in League of Legends, becoming some of the most played non-Summoner’s Rift game modes. However, as things stand, neither can become permanent additions, and Riot Games thinks that’s for the best.
Riot clarified its decision to make Arena and Swarm rotating modes and had a whole lot more to say in a Sept. 23 dev diary focusing on the future of the two modes. In it, Riot’s devs elaborated on the incredible success Arena had initially, but also how it saw significant losses in terms of player count after the first two months. “Arena performed very well for the first two months of its run, but then engagement started to dip significantly,” the devs said, adding, “We believe this is due to a lack of novelty and progression systems that would keep Arena players coming back.”