Taking the unsteady groundwork of microtransactions and transforming it into a more consumer-friendly model, the live-service approach often sees a game release and the developers continue to work on it for at least a year or two, adding new content every few weeks to keep its player-base coming back. This steady stream of content is then used to entice players to purchase in-game cosmetics using real-world cash, therefore keeping the game profitable long after its initial release. But if Knockout City and Rumbleverse show the industry anything, it's that the live-service model isn't without its glaring flaws.