Kelle Arena is a browser-based voxel FPS where players join ready-made or player-created rooms and compete in different modes. Players can choose maps, room settings and multipliers; the game guide describes destructible block environments, weapons, health pickups and collectible kelle dropped during play. The site offers guest entry and X account linking, and includes an in-game market for buying lives and selling kelle for ETH on Robinhood Chain. Players can manage an in-game wallet and withdraw ETH to an external address.