Roblox

VS

Castaways

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.

Castaways by Branch.GG is a sandbox adventure game available for web browsers, released in 2022. It has had some viral moments on social media and Twitch since launch, but as a small studio release, its daily player base is likely modest, in the low thousands, and has probably stabilized post-launch. Ongoing development and updates may keep a core community active, but the lack of a major publisher or wide platform presence constrains larger growth.