Helldivers 2 grunts think they've found more evidence of a Halo crossover thanks to a very familiar "unknown signal" detected by the Galactic Warning System: "Is that... THE SUPERINTENDENT?"

Helldivers 2 grunts are convinced they've found even more evidence of an upcoming Halo collaboration, as a mysterious "unknown signal" sounds very familiar when played in reverse.

Yesterday, Helldivers fans went feral when a new trailer promoting the game's upcoming Xbox Series X|S release featured a small snippet of the Halo 3: ODST soundtrack. That was already compelling evidence suggesting a collaboration could be on the way to celebrate the launch on a new platform, but the teasers don't stop there.

All across the Helldivers Discord server, the official Galactic Warning System bot has shared a warning, along with a "broadcast" that it's detected. Don't put your volume up too high, as it's rather loud and very shrill, but you can listen to it below.

Sound familiar? As fans have pointed out, when reversed, it sounds an awful lot like "the phone alarm for Vergil, the superintendent AI of the city Halo 3 ODST takes place in. It rings when you have audio logs to collect. It's basically a 'Hey! Something important over here!' signal, just reversed."

In case you need any further convincing, just take a look at this comparison of the two sounds – surely that's too similar to be a coincidence, right?

Clip comparing a segment of the reversed signal to the Halo Virgil sound from r/Helldivers

"Is that...THE SUPERINTENDENT? YOOOOO," one Halo fan reacts, while another theorizes: "It's either ODST/Vergil calling out for S.O.S. or something far worse similar to Reach…"

Again, if there ever was going to be a Halo collaboration, now really is the perfect timing with Helldivers 2 coming to Xbox on August 26. There's no official announcement of a crossover at the time of writing, but Arrowhead CEO Shams Jorjani is already hyping fans up for something, having previously warned everyone to "prepare your pants."

Even Helldivers 2 studio CEO agrees Fortnite's new bug-squashing season "feels very democratic," but only God and General Brasch know if that makes an official collab more or less likely.