I was told by the live chat moderators at wikipedia that they do not deem Geist Force and other Dreamcast games that have been released in recent times "valid" or "real". I have some quotes...

"an unreleased game is unlikely to be notable"
"to be considered notable by Wikipedia's standards, the game must have received significant coverage in reliable, independent sources such as newspaper articles or reviews in reputable gaming magazines"

I understand where they are going with this. They are not game fans, programmers or code writers, so there is no understanding the achievement of such development.