World Eternal Online

This is a free-to-play MMORPG that can be played in short, casual sessions, suitable for playing while bored or killing time. While it offers asynchronous multiplayer and a standard progression system, it is heavily pay-to-win, making free-to-play progression a significant grind. It's best suited for players who enjoy a relaxed, low-stakes MMO experience and are either willing to pay for advantages or don't mind a slow progression.