I disagree that bullet witch is more memorable than portal although bias and the fallacy of trying to remember unmemorable games is making it very hard to tell if that would still be true with other titles. My instinct is that uncommon, distinct words (Portal, Watchtower, Celeste) are more memorable than combinations of words that compete against each other rather than forming a whole (Bullet Witch, Star Fox, Crash Bandicoot: Twinsanity). Although now that I do have examples… I have no idea, honestly it doesn’t seem super correlated.