They don't look much like zombies in my opinion. Well atleast not the zombies I saw in L4D. They looks more like ones in Resident Evil 5 but without the nasty thing comming out of their mouth.
Now that I have a look at the game, it looks kinda like Borderlands. I mean the fact that you get exp and that enemies have some sort of numbered health makes it like that but also like gonic said, looks like Far Cry.