World of Sea Battle

VS

Vigor

World of Sea Battle is an indie open-world naval action game with RPG and simulator elements, developed by Thera Interactive. While it features open-world and multiplayer tags, the lack of wide recognition, a major publisher, and mainstream coverage suggests a small but steady niche community. Its indie studio background and limited marketing mean the player base is likely in the low hundreds daily. I do not classify this as a true MMO as there's no clear indication of massive concurrent player interactions.

Vigor is a free-to-play online shooter developed by Bohemia Interactive, released in 2019. It has maintained a niche but stable player base, especially on consoles, due to its unique survival and looter-shooter gameplay and ongoing updates. However, as a session-based instanced game rather than a persistent world, its daily active players are modest compared to larger titles.