Plot: Into the Dead is a zombie-themed action video game developed by PikPok and released on December 6, 2012 for iOS, Android and Windows Phone 8 platforms. A sequel titled Into the Dead 2: Zombie Survival was released for Android, Apple, and the Nintendo Switch. Wikipedia
Plot: Dead Trigger is a zombie-themed first person survival horror 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