Myst Online: URU Live

VS

Roblox

Myst Online: URU Live is a cult classic adventure MMO that has seen several revivals since its original 2007 launch. It is supported by a small but dedicated community and is maintained as a free-to-play title by Cyan Worlds. Activity is low, with only a few dozen to a couple hundred daily players due to its age and niche appeal.

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.