If you glance at a screenshot of Mutant Year Zero: Road to Eden, you would rightfully assume it to be a grid-based tactics game like XCOM. While this is an apt and welcome comparison, Mutant Year Zero works to evolve that genre in a pretty logical way: by adding stealth and real-time ambush mechanics to the strategy game formula.
The combination of exploring open environments in real time with turn-based skirmishes makes combat move faster while not sacrificing the tension of other tactics games.
Source: Destructoid Review: Mutant Year Zero: Road to Eden