Indoorsman

Indoorsman is an achievement in Dead Rising. It is completed by stayin inside the mall for 24 whole hours.

Glitch
There is a Glitch to get Outdoorsman easily. Stay in the Entrance Plaza before the zombies break through for 2 hours (1 day in game), then, return to the Security Room and save. Restart your X-Box 360 and load the game, immediatley after, you will get the Outdoorsman Achievement.