Alpha Protocol - GC Preview @ GameSpy

Showing off the character's safe house/base seems to be the theme of the Alpha Protocol demo at GC, although here's a vague bit on multiple endings and Mass Effect similarities:

Whatever way you bring your missions to a successful end, you will be rewarded with points to spend in your various abilities in a way that closely resembles BioWare's Mass Effect. So, at the end of the game you will have your personal Michael Thorton, with his own skills and his own face and accessories. Oh, as far as the end of the game is concerned, when questioned about it, the developers mentioned the presence of multiple endings. Of course, it will be the choices that you make during the game as Thorton that will change your fate and the story that you will experience.