Connect your iPod Touch to a Wi-Fi network. Open the “Settings” application and tap the “Wi-Fi” line. Toggle the “Off” switch to the “On” position and wait for the device to connect. If you are in an area where you have never connected to Wi-Fi, you will have to manually choose a network and enter the password, when applicable. Hit the “Home” button to return to the home screen, then tap the “App Store” icon. Choose the “Search” icon from the toolbar at the bottom of the screen. Enter the name of the game in the search field and tap the blue “Search” icon at the bottom of the keyboard. Tap the name of the game in the search results, which will have the word “Install” just to the right of it, indicating that you previously paid for the application. Tap the green “Install” icon on the game’s profile and enter your Apple ID password in the dialogue box, when prompted. The game will download to your home screen again.
