The normal maps combiened with lighs that's what make the game looking goo

There is no detailed storry. It's just a fun game with lots of blood and several levels.
I like that concept : like in the old good days where you insert a cartridge on the SNES and just press start

For the seams, perhaps the player won't have time to notice them during game, specially with movement !
I think Frank_G talk about the first picture, where the zombie o nthe left have a visible seem on the right shoulder ! that's easy to fix !!

For Depth Of Field and normal map do you use some special modified shader or shaders made by a user ?