“在线游戏”常见的英文表达是 online game 或 online gaming。
online game：通常指单个的在线游戏产品，例如 “This online game has attracted millions of players.（这款在线游戏已经吸引了数百万玩家。）”
online gaming：更侧重于指在线玩游戏这一行为或领域，例如 “Online gaming has become increasingly popular in recent years.（近年来，在线玩游戏变得越来越流行。）”