...There was a hole.
Updated on 3 February 2021
Pinnacle Station, an add-on that brought a small hub and combat simulator to Mass Effect 1, isn't included.
If you're familiar with the saga of this DLC's inclusion in other versions of the game you may know what's coming - but, if not, BioWare has now confirmed why.
Pinnacle Station was skipped over when the original Mass Effect belatedly launched on PlayStation 3, some five years after it originally arrived on Xbox 360.
At the time, BioWare admitted its source code had become corrupted and it could no longer be worked upon. Now, and despite fresh efforts from BioWare to resurrect the add-on, this is sadly still the case.