Infected is a game about an Apocalypse - one that appears to be a zombie apocalypse at first, but which develops along far stranger and more eldritch lines as time goes on.
The rules, based on the Schema engine, are built for an action game, which includes fighting, but also includes running, dodging, holding shut doors against the dead, and so on. There are zombies. There's eldritch things. There's sorcery. And there's some moderately mad science.