https://www.pcgamer.com/dear-lord-even-maplestory-2-has-a-battle-royale-mode/

We are rapidly approaching the point where a game not having a battle royale mode comes as a surprise. Or maybe I blinked and we're already there? Because apparently MapleStory 2 has joined the fight: its battle royale mode, Mushking Royale, was announced earlier this year, and will be included in its upcoming beta (which you can apply for here). The beta runs from July 18 through July 31, but Mushking Royale will only be playable from July 20 through July 22. 

If your memories of the original MapleStory are anything like mine, you're probably wondering how you could pull off battle royale in a 2D action RPG. Well here's the second-act twist: MapleStory 2 is actually a 3D, isometric action RPG. And as weird and unlikely as it sounds, Mushking Royale looks the part. See for yourself: