Powerline.io

VS

Roblox

Powerline.io is a browser-based .io game that released in 2017. These types of games generally have strong early popularity but decline after a few years, although a handful maintain a steady niche audience. As of 2024, retention is likely modest but stable, with thousands of daily players, similar to other .io games like Slither.io. The game runs on lightweight multiplayer lobbies, not a persistent world, so it's not an MMO.

Roblox is a massively popular sandbox platform, released in 2006 but continually updated and widely adopted by younger audiences globally. It consistently reports tens of millions of monthly active users, with peak daily actives usually around 5–10% of monthly users. Recent filings and reports indicate Roblox has over 60 million daily active users, but this covers global user logins across many devices and experiences. Adjusting conservatively for reporting and engagement variance, daily actives typically exceed 50 million worldwide, but simultaneous users generally peak in the hundreds of thousands to low millions. As a platform with persistent worlds, it fits the broader MMO definition.