So, how does one go about disguising Frank West as Roll Caskett? GameFaqs finally has the answer: "Beat it [the game] on Hard with S Ranking"
Beating such a feat is no walk in the park: An S-rank requires you to complete the game in a fast manner, roughly under five hours. In addition, you're required to rack up a certain amount of "zombie points," 12,000 or so.
You can see a few pictures of the Roll outfit in action here .
News Credit: Mirage86