I've played all the South Park games, and honestly I wasn't going to give this a try. But I said What The Heck and bought it for 40$. This game is really good. The story is fantastic, the humor is great, the gameplay is amazing, and I just love it all.
First, the story. Talks about the Evles VS Humans. Cartman is leader of the Humans, Kyle is the leader of the Elves. They are in a constant war for the "Stick of Truth" because "For whoever controls the stick, controls the universe" Keep in mind that it is not real violence, and they're actually hitting each other with sticks, it's all imagination. It is made to look like real violence, but it really isn't.
Second, the humor. I love the script of this game. Cartman has probably the best lines. It's just amazing how they got the humor so perfect. South Park fans will love this part.
Third, Gameplay. It's a normal RPG with a few tweaks. First of all, enemies aren't random, and you can avoid most of them, except bosses. One of my favorite parts is that your PP (Power Points) and HP (Health Points) regain by themselves when you finish the battle. That way you don't waste your items. There are certain abilities you can have depending on your class, Jew, Fighter, Mage, or Theif. Each of these abilities are unique in their own way. For example, Theif has a backstab, and Fighter has a move where you kick someone in the balls. You can also get Fart Magic, which is honestly the funniest battle mechanic ever. You unlock the abilities the more you level up, and can level up each ability up to a certain level (4 or 5 I believe). There's also tons of sidequests. This is probably one of my favorite RPG's ever.
Fourth, Customization. There are tons of customization options. Througout the game you can get wigs, facial features, and even clothes you can wear the make you stronger. Sadly you cannot be a girl, but you can make yourself look like one. You can modify your weapons and clothes to have certain colors or abilities. Things called "Perks" are unlocked by having friends in South Park. The more friends, the more perks. These perks make you stronger or weaker. You can modify your weapons and clothes by adding little patches that have certain abilities, like 20% more money, or Gross Damage, or even Bleeding. Tons of option here, you wont get upset by that.
Things I don't like about the game: First, it's really freaking short. It's not worth the 60$ it used to be, so they dropped it to 40. I reccomend waiting for a sale at like, 35 or even 30. Now the Saving feature in this game is absolute bullcrap. When you save it might save a little bit before where you actually were, making you have to do a battle or 2 again. Another thing I don't like is how the difficulty suddenly raises halfway through the game. Then again you can customize the difficulty to your taste at any time.
This game really is good, but it does have some faults. Also, you can fart on people, highly recommended if you're into this humor and gametype. I'd say wait till it's on sale though, not worth the 40$ in my opinion.