I hope it's a font even if it looks like a paint brush (oh and btw if the "nazi zombies" isn't a font, can you tell me what is the "WWII" one ?)
Thanks !

United Serif  Suggeriti da NAL 
Kaine  Suggeriti da donshottype 
Girga  Suggeriti da donshottype 

Jonathan Hill's Kane has similar letter shapes and a stencil version, but the cuts are in different places.
If you made your own cuts on the plain font the result would be close to _WWII_.

Some similarities to Girga.
Serif at apex of _W_ would have to be clipped and stencil lines cut for a result closer than Kaine.

WWII is United Serif. Nazi Zombies is probably custom-made as the two Zs and the two Is are different to each other.