In Dead Rising 2 for the PS3, Xbox 360, and PC, there is a four piece suit of armor you can collect that will reduce your damage taken by half when you wear it. Once your life goes below 50% though, it will break apart and you’ll be in your boxers taking regular damage, so be careful.
Beard & Mustache – At the back of Wave of Style in Royal Flush Plaza
Knights Armor – Complete the game with an S rating
Knights Boots – Purchasable from Moe’s Migitations on the Platinum Strip for $2,000,000
Knights Helmet – Rescue jack in the “Meet the Family” case, and beat him in strip poker in the “Ante Up” case