You can't swing a severed limb around on the Play Store without hitting half a dozen zombie games, and first person shooters (even high-end variants like Unkilled) aren't exactly thin on the ground. But you might want to give Dead Effect 2, the sequel to a 2013 science fiction-horror shooter, a second look anyway. While the premise isn't exactly original, falling somewhere between Alien and Dead Space, the sheer variety and polish makes it worth consideration from Android gamers.

First of all, the game seems to have a much tighter focus on storytelling than other zombie shooters. You pick up right where the last game left off, on a derelict spaceship crawling with undead crewmembers and other, more elaborate monsters - think Doom 3 with iron sights.