For those too young to remember, back when Halo was huge every gaming publication was always like “is this new shooter X going to be the Halo killer?” Every time a big multiplayer shooter was announced, there was speculation about whether it was going to be the Halo killer.
Now that Halo is dead, which game was the Halo killer?
I would argue that Fortnite deserves the title of Halo Killer, because Fortnite popularized the F2P monetization model that all multiplayer shooters follow nowadays, which 343 failed horribly at implementing. If we still lived in a pre-Fortnite world where Halo Infinite didn’t have to follow the “F2P with a battle pass” approach, then it might not have failed so badly.