The best game I have ever played.
The shooting and platforming gameplay, as well as the graphics are top notch. The humor is on par with the rest of the series, and the storyline is just as good.
What sets this game apart from others are the unlockables, upgrades, and optional experiences. All weapons can be upgraded multiple times, and there are tons of hidden items and skill points to be earned. The 2-D Captain Quark mini-games are classic and are not to be missed.
This game also offers an online mode. It truly offers more than anything else on the PS2. The production quality is great, the content is interesting and innoffensive, and it is just plain fun. This game is easilly the best buy for your money.