*DeadTrigger* Officially©(Con·cept"℠™] [ˈKän-ˌsept"©®)

Overview
Dead Trigger is a zombie-themed video game developed and published by Madfinger Games. It was released in June 2012 for iOS and Android mobile devices. The game is single-player only. A sequel, Dead Trigger 2, was released in 2013.
Wikipedia
Quick facts
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Platforms: iOS, Android
Developer: Madfinger Games
Initial release date: June 26, 2012