Arc Raiders was announced back in 2021 as a free-to-play co-op third-person shooter, and has been delayed several times since. That's partly because Embark Studios' other in-development game, The Finals, progressed faster than planned and stole its momentum. It's also because it was re-tooled at some point as a PvPvE extraction shooter.
Now it's back again, aiming for release next year, and it's been re-tooled a little more: it's no longer free-to-play.