An awesome, FPS-like game. Underwater action, and even now, you can't call this graphic "outdated" - after 13 years, it's still not that bad on maximal settings.
Game is really addictive, I've played it for the first time in 2003, in my childhood times. Now, when I play it, I still enjoy it really much.
It contains a campaign with about ~40 missions, 4 fast-battle maps and a multiplayer mode, so it will give you at least 10 hours of great gaming. Totally worth that price.
Also the soundtracks are awzum - while shooting all the enemies, you'll listen to "nightclub-great tracks" :3
Would recommend, 10/10, even 13 years after release.Edit 11/3/2015
1) Since Multiplayer servers were provided by GameSpy, there is no chance for multiplayer gaming after GameSpy has been deleted. So if you want to play on Multi, the only option would be through a VPN client with friends through LAN mode.
2) Some of you may have trouble with movement. I don't know why, but with optical mouses it's sometimes very hard to look around. Lowering your sensitivity helps you a bit, but if it still too annoying for you then the best solution is to play either with controller or oldstyled mouse (that ones with a ball inside instead of a sensor, I don't know how this is called)
3) If anybody else got addicted to game music as much as me, look in YouTube for "PVCF" - all soundtracks would be listed there - HYYYYYPE /o/
Enjoy the game ^^