Ok, so i have found alot of tips on DeadRising that may help you on the game!
When their is a pack of zombies infont of you and you don't wanna use your 'Queen Bee' Take out your shot gun! It may look week but it can take out a alot of zombies in one blow!
To get an 'A' in a mission this is what i do to get it; Don't one from the zombies. Kill as many as you can. And don't run from them! Always kill them!
Here are the list of the good hand wepons to use!
Knife,BassBallBat,That metal thing out side the air duct, Trash can, lawnmoreer. Reason why i dident say ChainSaw is because if you get bit you drop it.
Well thats all i have but if i get more tips ill update this. Buh bye zombie killers!