This poll came to mind...since the opening screens of a game usually leave some impression on me.
PSII won my vote. The two images of Mother Brain (that's who it looks like to me!) both watching over the three planets of Algo both harbor different expressions; the one on the right has a somewhat tranquil feeling to it, as opposed to the other side of Mother Brain, which has a more sinister look painted on her face. (Come to think of it, she was rather two-faced, wasn't she? )
She holds control over the planets' fate in her hands, and under her watchful eye there is little doubt in her ability and she is thought to never make mistakes...of course, it's easy to place faith in a super computer that turned Motavia into a lush, green planet and provided people with comfort and easier lives.