Massively multiplayer online games, or MMOs, drop large numbers of players into a persistent shared world that keeps evolving whether you're logged in or not. Players build characters, join guilds, trade, and tackle group content together over long stretches of time. From the open expanses of Black Desert to the ongoing missions of Destiny 2, MMOs emphasize progression, community, and live content. Expect deep systems, social hubs, and worlds designed to be revisited for months or years.