You must upgrade to iOS 6.0 or higher or Android: Honeycomb (Android 3.0 and above) to play Undead Assault. If you do not have an iOS/Android capable device, Undead Assault will not work properly.
PLEASE NOTE - Google Play has unfortunately removed the Android version of Undead Assault, due to issues beyond the developers control. We are very sorry for this removal and are hopeful that a new version of the game may be created in the future. We will attempt to keep the game on iOS devices as long as possible. Thank you!