Okay, technically Bungie was working on a RTS game called Halo when MS bought them, but it was after the purchase it shifted genres and found its groove.
In other words, this "echo" isn't really what you are saying.
Second: Do you recall the keynote where Bungie unveiled Halo for the first time... at MacWorld 1999? For reference, Microsoft acquired Bungie in 2000. I've literally never heard the assertion that Halo was intended to be an RTS; my understanding is that it was originally going to be a third person FPS, as the 1999 MacWorld trailer suggests, but was changed to a first person FPS when Microsoft purchased them.
The earliest versions were basically built on top of Myth's engine, Bungie's RTS. It then eventually became a third person shooter, and it was such at the MacWorld announcement. It did turn into an FPS after the Microsoft acquisition.
(I will look forward to people who were screaming that console makers mustn't be allowed to buy game authors and studios seamlessly turn a 180 if it favours their tribe.)
Myth and Marathon were experiences in storytelling for me however. I even have a copy of the GURPS Myth roleplaying guide sitting on my bookshelf behind me that goes more into the lore of the Myth universe.
And with this recent 30th anniversary event, it also seems like they kind of think of all of their various older IPs to be in a multiverse of some sort.
(And Pathways into Darkness was also an FPS, just like those three Marathon games. Bungie has been doing FPSes for a long time, 100% agree with you.)
It may have been an RTS initially, but when Microsoft bought Bungie, it was already "Combat Evolved" and near release.
A lot of development happened right before Combat Evolved got released due to Microsoft injecting a lot of money. It wasn't just an Xbox port of an already finished game. Look at the E3 2000 trailer which is pretty much what has been shown at Macworld the year before. Combat Evolved looked quite different when it came out a year later. Note that Microsoft acquired Bungie in 2000.
I loved Myth and Myth II. A space-based one would have been great.
I don't understand the timeline, though, as the videos shown at MacWorld in 1999 (before Microsoft), show Halo as a first-person shooter. The video is linked above. I think it was a FPS long before Microsoft was interested. I think Microsoft bought it specifically because of the FPS game.
But according to https://www.vice.com/en/article/xwqjg3/the-complete-untold-h...
It was already an FPS by 1998, 2 years before Microsoft was involved, and a year before the video shown above.
They started as an RTS, then decided it was way too much fun to actually drive the vehicles, and the rest is history.
Microsoft definitely helped with the development, but Microsoft bought a FPS game, not an RTS one.