I had lots of fun with the multiplayer in this game back in the day. The destructible environments was a first for me, and was quite incredible as a technical feat, at least back in the early 2000s. Also, I loved the Rail Gun in this game - creating a tunnel of destruction in a wall with my rocket launcher, jumping into it, and then sniping through the wall at others was so much fun.

However, I think the FPS genre ages the worst. Unfortunately, this is hard to play nowadays.