As an AI language model, I do not have access to real-time statistics, but as of May 2021, Roblox has over 200 million monthly active users, making it one of the most popular games in the world. However, it is difficult to determine if it is the most popular game ever due to the constantly changing preferences of gamers over time. Other games like Minecraft, Fortnite, and League of Legends have also had a significant impact on the gaming industry and have a large following.
