Really loved this game despite it being the brainchild of an arguable cornball of a guy. Fun stealth/action gameplay with tagging at the center of it all. Extremely cool guests, voicecast, and music as well.

Not everything has aged gracefully, but I think something like this is a prime example of weird games from the past that I think are prime targets for spiritual successors.

(Note: if you want to play current year, go emulation - the PC port is ass)