God of War was revealed as a PS5 game. It was changed to a PS4/PS5 game.
Avowed was revealed as an Xbox One/Xbox Series X game. It was changed to a Xbox Series X game.
You say Microsoft never said they would never put any Series only games? That's true. Sony never said they would never put out any cross gen games. So did either really lie at all? The crux of the "lie" is really the fact that the target platforms for the games above changed, not because either Microsoft or Sony made ironclad vows about what systems they would be on.
Yeah, I wish we could be critical of these circumstances without having to litigate who "lied" and fight over it. Circumstances of both console launches have been extremely difficult, and whether or not the companies always had cross-gen plans or not, the past year has been tumultuous. It's a year of water under the bridge, we can say our peace on the choices made and ask for answers to ramifications of these decisions without using each company's past comments as a cudgel to beat them to death.
(I personally believe that Sony was honestly planning on GT7 being PS5 only and made a late-in-development decision; and maybe GoW was or was not, maybe they didn't say it when they confirmed Spider-Man and Horizon because the project could have gone either way; then on the Xbox side, I'm sure the bosses were confident in the value of cross-gen and strength in harnessing the full scale of scalability in modern game engines, which they had to deal with anyway with PC versions always planned, but then behind the scenes the developers were probably questioning how they were going to get back down to X1S and were relieved when they showed some flexibility on the "first two years" cross-gen plan. Oddly, even now, now, despite MS being out front on the cross-gen announcement plan, the "
Optimized for Xbox Series X/S" website has only one upcoming game by Xbox Studios as Dual Gen, which is Halo Infinite, so that side of the cross-gen decisions may still be in flux. I don't really have better evidence than what's out there, but a lot can change in a year of production, especially a year as complex as 2020.)
To be clear, though, God of War was revealed as "a game", with no further info besides the text "Ragnarok is coming" and a cypher logo (and then the date, which slipped.) That trailer was part of the "PlayStation 5 Showcase", so it was obviously a PS5 product, but there was nothing about it being exclusive.
On the Xbox side, the Xbox.com website was always super chaotic in that month of announcements, with Halo Infinite still listing "Xbox Project Scarlet" for weeks and lots of Xbox One listings at first (they were also odd to the press about MS Flight Sim having or not having an Xbox One version, but the
current promo page says "Xbox Series X/S - Windows 10 PC" and nobody alive could fathom how that would be possible any other way...) In the announcements of both
Avowed and
Everwild, there is no mention of platforms in any of the trailers, even back to the EverWild X019 reveal where Everwild was revealed as new IP.
(I remember at the time watching all the Xbox Showcase titles and waiting for the end cards, I was a picky bastard and couldn't help but asking, "Okay, is this cross-gen, or will this come after the 2-years-mark? How about this one? Is there a difference yet between cross-gen and full-exclusive yet, or did the "scaling" thing work out?" So then, the ride on Xbox.com of the listings showing and then removing Xbox One badges was really crazy to go through...)
The new generation of platforms were obvious targets, but other than that, we jumped to conclusions through either the lie-of-omission or the contradictory messaging/info.