Upgrading Android
In order to install and play the Duke Nukem game for Android, the G1 must be running version 2.1 or later of the Android software. Contact the phone's carrier for directions on how to upgrade the software as the upgrade is not available directly from Google.
Android Market
Access the Android Market from the link provided on the G1 phone or by accessing the Android Market website using the phone's browser. Once on the site, simply search for the game "I am Duke Nukem." Download the game to the phone by clicking on the green "Install" link.
App Brain
G1 users who use the App Brain service can download the Duke Nukem game by searching for it on the App Brain website. Once on the page for the game, it can be downloaded by clicking on the "install" link in the upper left corner of the page.
Improving Gameplay
Ensure that the phone has plenty of free memory before starting the game by restarting the phone. This will guarantee that the maximum amount of free memory is made available to the Duke Nukem game.