Hack Walters is still with Bioware, as evidenced by his presence in the "ME4 HYPEHYPEHYPE" vid from E3. According to the intenet he and Hudson shut themselves in a room after the leak and wrote the ending we got pre Extended Cut.BlueJoneleth said:No he left before the end.Optimystic said:Pretty sure that was Mac Walters who is still there.Coruptin said:Was this the guy who decided to write the ending to mass effect 3 by himself
Mac Walters wrote the gurren lagann ending that got scrapped.
You may be thinking of Drew Karpyshyn, the lead writer on KoToR, Jade Empire and ME1/ME2, who left before ME3 to write The Old Republic and then bailed alltogether after penning a dreadful resolution to Revan's saga.