I'll be demonstrating two ways on how to make a hunger and thirst bar that relates to the player, and increases over time. The second tutorial covers how to create items (eg.: food, and water) that can counteract the progression of the starvation and dehydration.
Have you ever wanted to make a Beta of your game that requires a code, like Medal of Honor or Halo? Are you planning on selling your game? Want to protect it with a serial? This tutorial will teach you how to create a basic Serial/Beta System.