SubSpace

VS

Roblox

SubSpace is a classic multiplayer action-shooter released in 1997 that was one of the first to feature a persistent, massively multiplayer online environment. While it has nostalgic value and a cult following, its age, lack of mainstream support, and niche status mean its active player base is very small, likely in the low hundreds at most.

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.