SanAndreasX said:
Mass Effect was originally an Xbox exclusive funded by Microsoft, until EA bought the series when they bought Bioware. Bioshock was a timed exclusive to the 360. |
Microsoft published the 360 version. As far as I know it is unclear if they funded the game or just paid for timed exclusivity.
Based on the quality of the PC version which was released just 6 months later it doesn't seem to be a rushed job, so the PC version was probably planned long before the EA acquisition. Similar to former Bioware releases like KotOR and Jade Empire.
The late PS3 port on the other hand seems to be an afterthought.