So I just just downloaded the game and got it running and everything, but now the game constantly blares Chimaira's music at my in the menus, while in game, everywhere. Now, this is kinda weird, because I'm pretty sure that when I owned the game a good 10 years ago it didn't have groove metal. Nothing against Chimaira, but they don't exactly suite a game like Alien Nations.

Is this some kinda glitch or was it intentional or what?

I believe the solution can be summed up thus: Take the Chimaira CD out of your disc drive. :P

It is a glitch, though, as there's no music at all otherwise.