Not only the name, but the entire premise of Kingdom Hearts is pretty hard to take seriously if you mention it to someone who has never played it before.
I played a game called "Another Code: Two Memories". Sounds rather nerd-ish in a non-nerdy kind of way; can't say it's my favourite game though.
Last Window: The Secret of Cape West is my favouritest game with a "nerdy" title I guess. I don't know what constitutes as nerdy, but hey, you don't hear many games with titles such as that.