Oort Online

VS

DayZ

Oort Online is the original title for what later became 'Boundless,' a sandbox MMO developed by Wonderstruck Games. As Boundless, the game launched in 2018 and has since maintained a niche community. However, its daily player base is quite small due to its age, limited marketing, and niche appeal. It still has elements of a persistent world and large-scale multiplayer, thus fitting the MMO definition, but its active player count in 2024 is likely under 200 per day.

DayZ is a well-known open-world survival game by Bohemia Interactive, released in late 2018. It remains popular within the survival genre and typically holds a strong concurrent player base, especially on PC with additional activity on consoles. Its age means it's past its peak, but it maintains a loyal community and steady content updates, resulting in an estimated 45,000 daily active players across platforms.