If you haven't come across it yet, a new adult-animated series called Secret Level arrived on Amazon Prime in early December, and it seems to have been a big hit so far - to the point where it's been greenlit for Season 2!
All of the episodes in Secret Level are based around video games, including the likes of Sifu, New World, Pac-Man, Armored Core and Mega Man, but notably only The Outer Worlds makes an appearance from Xbox's first-party lineup.
The creators did try others, though. As revealed by executive producer Dave Wilson in an interview with Collider, they attempted to create an episode where Halo's Master Chief and the DOOM Slayer would cross over, but it wasn't to be.
"The creative director at id [Software] is a good friend of ours, and so are folks at Microsoft, so we made a big plea because one of the things both Tim and I would love to do is do something that isn't currently available in the games, like crossovers. We wanted to make a Master Chief/DOOM Slayer crossover episode, and I spent a whole weekend crafting this impassioned letter of my childhood. And it's exactly what Tim said; they were like, “Nah.”
Wilson did go on to explain, however, that a lot of video game IPs have "preexisting deals" and other factors which can complicate matters when trying to snap them up for a new series. It sounds like quite a few companies rejected their approaches, and apparently they even "begged" Valve for a Half-Life episode - which clearly didn't work out!
Of course, with Season 2 now confirmed, there's every chance that Microsoft may see fit to approve the idea for next time around, which surely we'd all love to see! Halo and DOOM in the same episode? Make it happen, Mr. Spencer!