Re:Birth Online

VS

FiveM

Re:Birth Online is a lesser-known action fantasy RPG released in 2020 by CaretGames. As a PC open-world RPG, it likely launched with modest expectations and hasn't maintained major visibility since release. Its age (4 years) and lack of widespread recognition suggest a small, niche but persistent player base typical of indie MMORPGs. There is no indication of major publisher support or ongoing expansions that would drive significant numbers higher.

FiveM, released in 2016, is a popular modification framework for Grand Theft Auto V that enables custom multiplayer servers, especially for roleplay communities. Its active modding scene and the enduring popularity of GTA V have kept its playerbase strong, typically with hundreds of thousands of daily players. However, it's technically not an MMO as individual servers usually host dozens to a few hundred players, not a persistent shared world for thousands.