If you're looking for a hacked version of the game, it's essential to exercise caution when downloading or accessing such content from third-party sources. Hacked versions of games can sometimes contain malware or viruses that can harm your device.
Even with unlimited resources, a little strategy goes a long way in clearing "Nightmare" and "Apocalypse" modes: The Ultimate Kill Zone:
Downloading "hacked" .exe or .swf files from unverified sources can expose your device to malware. Strategic Context (Non-Hacked) For those writing or researching the game's mechanics, the S.A.S. (Special Air Service) theme is grounded in real-world elite military history SAS Zombie Assault Wiki
"Any modification of game client files is a violation of our EULA. We reserve the right to permanently suspend any account associated with cheating, regardless of monetary spend."