I've heard good things about the series, it was one of the first western animated series to have an X-Files style myth arc with everything building to grand finale multi-part conclusion.
All with out spawning from a legacy IP or existing to support a toy line. I would be curious if the game has anything close to such narrative ambitions or of it stripped away the world building for a generic action shooter experience.
The game is ostensibly an exploration-based brawler in the style of Spider-Man, but it's simply too ambitious for the studio's resources. The environments are empty and the sound is awful.
The GBC version looks better, although you never know how they'll play, I remember many games that looked good but ended up being boring.
For those who want to give the TV series a chance, comparisons to Men in Black don't do it justice. Don't get me wrong: MIB is a very good TV series, but it's in the style of Real Ghost Busters, with a monster-of-the-week format and a team dynamic that works like a tried-and-true recipe.
The Roswell Conspiracy is a story with a clear ending in mind, so the character development is palpable, and although it feels limited by today's standards, it was revolutionary in its time.
The premise is fascinating: Vampires, werewolves, Yetis, Banshees, and other magical and mythological creatures are actually extraterrestrials, and although they have been present on Earth for centuries, since 1947 (the Roswell incident) the United States government has been capturing them.
The protagonists are a human who has the vision to see the aliens beneath whatever method they use to hide their true nature, and a banshee who serves as an alarm whenever they are about to die. As they capture aliens, they discover that things are not what they seem in Roswell, and the ending is quite satisfying because it involves an alliance between all the characters who appeared in the series.
Is it perfect? Not at all. The animation is quite stiff, and censorship interferes with both romantic relationships and violence. But beyond being a historical artifact of what animated series were like at the beginning of the century (standing out from those of the 90s but still lacking the freedoms and resources of current series), it is an intriguing and fun series that tried to show a complex and interconnected universe without being based on any kind of book, comic, or video game.