I have to say that after reading all of the terrible reviews of this game I was very hesitant to even rent it via this service. To my surprise the game turned out to be halfway decent but it still retained its drawbacks.
The game is separated into 3 stories that all intertwine and this seems to be how the programmers managed to keep an otherwise boring game interesting. If the game were to follow only one character, then I would have kicked it out of my PSP after 2 levels. Luckily it's not. Each segment is spaced evenly from the next so much so that the game does not feel repetitious.
The controls are good but not great and the collision detection needs to be tweaked a bit. There were plenty of times when the character died and I was nowhere near anything that could have harmed me but with the game's liberal save points it doesn't make it too difficult to get back to where you left off.
You'll have the sporadic moments where you wish you could control the camera more than panning left, right, up and down. Most notably, you'll want more camera control during Brian's stealth moments.
Overall, the game is a decent mix of beat-em-up, stealth, platform, and even some pseudo 3-D shooting. Is it worth the typical $30 price? Eh, not really. Save yourself some cash and just rent it. I bet you'll beat it within a few semi-frustrating days and want to send it back.
If you're a fan of the TV show, you should definitely check this game out! However, if you can, play it on the PS2 or Xbox. The PSP is a direct port from the console version. All the original voice actors are used, and the spirit of the show is prominent. However, most of the levels do NOT adapt well to the PSP version! The analog sticks on the console version work well. But it is fairly hard on the PSP. Early on, one of the Stewie leves has a series of jumps that climb a microscope. It is almost impossible on the PSP!! Then, playing the Peter levels, which is all combos and analog sticks, make it hard for the PSP to keep up. A couple of times, I got lag in the middle of a bunch of enemies. A friend lent me his PS2 version, and there was an IMMEDIATE difference! The controls are very responsive, the combos work well, and NO LAG! After only a few minutes, it felt as though this game was made for the console; and a PSP version was sorta kicked out as an afterthought. On the consoles, it is a fun game that stays true the TV show; LOADED with references die hard fans will appreciate! On the PSP, you may be too frustrated, or (understandably so) give up on it, before you can enjoy all the jokes!!