Dead Ahead Zombie Warfare is a free mobile strategy game made by https://www.mobirate.com , and it was released on the 8th of March 2017.

The main objective is to destroy the enemy barricade while defending the bus by sending out various units as well as using certain abilities. Summoning units requires courage, a resource that is gained over time while abilities, and some units require rage, which is gained from killing enemies. Up to 3 stars can be earned upon a mission's completion depending on how much durability the bus has left at the end of the level.
( most of this was copy and pasted from the official dead ahead wiki https://deadahead.wiki.gg )