The only way to make the game slightly harder is to try to go through the stealth levels completely undetected. But overall, it's way too easy to kill the soldiers, and the bosses are overall not a challenge.

I would have to disagree with the previous comment about the shotgun...that's actually one of my favorite weapons. One shot, one kill for each soldier. It's also really fun and satisfying when your shots land! :)

All in all, it's a relatively fun game and it's amusing to hear David Duchovney and Adam West doing their voice roles...they definitely add flavor to the story! I think it'd be amusing if in the middle of the game, David Duchovney would randomly say "Where's Scully?"