who was the first ever player to play rivals

The most likely answer is that the first widely documented person to play Marvel Rivals publicly was xQc , based on a video titled “xQc Is The First Person In The World To Play MARVEL RIVALS.”

What that means

That does not prove he was literally the very first human ever to launch the game internally; it only shows he was presented publicly as the first person to play it.

Why the wording is tricky

“First ever player” can mean different things:

• First public player.
• First streamer or creator to play on camera.
• First tester in a closed build.

The available result supports the publicly marketed claim , not a definitive all-time development history claim.

Quick note

If you meant a different game called “Rivals” rather than Marvel Rivals , that would change the answer.