The game located in the FPS 2007 section, "Castle Knatterfels: Curse of the Zombie Krauts," is probably not a first-person shooter (FPS) in the way most people regard what a FPS is (especially in the year 2007). I'm not sure what the requirements are for inclusion but here is what "Castle Knatterfels" resembles according to what I've seen and what I've read on the Internet: The actual gameplay resembles that of "Operation: Wolf," where an off-camera protagonist is controlled by the computer and shoots towards the screen at sprite-based enemies. Most screenshots available for the game are only those of the CGI movies found within the game and don't represent the actual game itself.
Here is a link to an actual screenshot of the game (It is the first screenshot in the thread):
http://www.gameprotv.com/foro/viewtopic.php?t=65870