RELATED: 10 Best Free PS4 MMO Games You Can Play. Unsurprisingly, the Xbox One is not exactly overstocked when it comes to MMOs. Now, in all fairness, the same can be said about the PS4, as the genre tends to shine the brightest on PC. That said, there are still a number of worthwhile free-to-play MMOs on Microsoft's hardware. Updated on March 28, 2020, by Richard Keller: The MMO is still.