| Ultima X. Simply because Ultima IX was the most appalling end to one of the greatest game series of all time. I would be content to let it rest if it were finished properly. Just one more game of Garriott's true, unrestrained creative genius to seal the deal and I'd be a happy man.
After that I'd probably say Deus Ex III. For the same reason that Warren Spector was off his game and in corporate/mass-market appeal land when Deus Ex 2 was spawned. |