Hint: Katana
As soon as you begin the demo take the first staircase to your right and walk up.

At the second store/shop on your left (it is a resturant/food court) enter the shop and jump behind the counter and walk to the juice section (you'll see it, mmmmm O.J.) after you replentish your health,walk to the right of the juice section and jump off-trust me.

You will land on an orange canopy and yeehaw you'll find the Katana that will slice and dice the hoards of zombies in your path. All though the katana does not last long, it is freakin sweet watching the zombies be cut into bloody pieces!

Hint: Bester Fester Beginning
Replay the first few portions of the game first -- save the couple and photograph them hugging for moola points. Kill a few zombies and then die around the parking lot area. When you "save and exit to title", you keep your character's development (and PP values) for the next attempt at the game. You can power up significantly to muscle through the later areas of the game!

Hint: Samurai Onechambara Zombie Action!
Screw the firearms. This is not Resident Evil! Stick with the samurai sword if you want to whack bosses. Deliver a few hits and your bullets can be saved for times when you need to attack at range to get to vital food and health items.

Hint - Jeep Inmates Tactics
Head to the North Mall across the park. Inside hunt around the shops that are under construction for the nail guns. You shouldn't need more than two. Go back out to the park the way you came in and the cutscene will play. Head to the trees near the Food Court and wait for the jeep to try and make a go for you.

If you stay in the tree area, the jeep should smack repeatedly into the trees, freeing up a major opportunity to nail gun the inmate on the machine gun from a safe distance.

Once he is down, nail gun the passenger, then finally the driver. Once all three are dead you can go examine the .50 Cal machine gun and dismount it. It holds about 200 rds and is extremely powerful (I used it to kill Carlito in one small burst). It is also extremely acurate (you can lightly squeeze the trigger quickly for single shot). One of the best weapons in the game!

Hint - Carlito Tactics
In order to beat Carlito, there are two ways I have discovered. Either go into the battle with two pistols, one of which is given to you by Brad and another you can find from a cop, or go into the battle with the sledgehammer or katana. Method one involves running through the Welcome sign and running toward the ice cream parlour, then turn 180 degrees and stand behind the boxes before you go into the seating section. There you can shoot Carlito but he can't hit you. Eventually he will run on top of the food places and you must turn and hide behind the boxes, strafing and shooting him.

Method 2 is to follow the beginning portion of one, except when you get to the boxes, run past them and climb ontop of the boxes that allow you to jump up to where Carlito is. Equip the sledgehammer or katana, then jump up when carlito is shooting at Brad or when he's reloading. Then just smash him, you'll take damage, but his flurry takes down one bar of health, so you should beat him and kill him with one bar of health left.
Submitted by coolcatch
Hint - Park Inmate Slaughter
Nine times out of ten when your escorting any survivors through the court yard you will have to deal with the extremely annoying and deadly inmates sporting around in there little jeep. Fortunately they are a little rusty on their driving skills and tend to run into walls.But that doesnt stop the inmate with the mount machine gun from unloading on you and your party of survivors.

The easiest way to defeat them is to go to the La Frescna Plaza and grab the Sub Machine Gun hidden in the Fountain. When you step out into the court yard immediately direct your party to run to the corner immediately to your right. then run left. wait for the jeep to run into the wall(because they will try to run you over) And concentrate all of your fire on the inmate firing the machine gun. It should take about 50 rounds and he's dead.

By now the jeep should already be backing up to make another go at you. dodgethe jeep just barely and right when the red "B" icon apears, quickly examine th e machine gun on the back. Now manually aim(with the large machine gun) and make short work of the other two inmates.