
Though Xbox was no stranger to breaking Game Pass into as many tiers as possible prior to Asha Sharma's ascension as chief executive, it would appear that the company under her direction wants to introduce yet another tier, one that only contains older first-party Microsoft titles.
As per Eurogamer (via Windows Central), datamining has shown that Xbox could be preparing to release an additional Game Pass tier, one that is far removed from all the others currently on offer. It would only give you access to first-party Microsoft games, not including day-one releases, but older ones whose prime selling points have passed.