First of all, extract the hack file on your computer or directly on your device. Then start Undead Slayer Unlimited Hack APK (or) Undead Slayer Unlimited Hack IPA and enter any email address you want in the Cheat Email field.
After that, click the Detect Device button, select the platform as Android/iOS, and tap the 'Connect' button. Lastly, choose the resources you want, click the Start Hack button, and wait until the process is complete.