My favourite arcade game, ever!
Voice acting has definately improved, hell yeah! No more 'WE'RE meeting G over THERE' computer-generated voices like in House of the Dead 2, there's more fluent and human voice acting.
The model weapon is OK, a micro-uzi. Reloading is weird, shake the gun. I skip this pain by simply moving my hand in front of the lens of the gun every time I want to reload. There are bits where the zombies grab you and you need get them off you by shaking the gun even harder -.-
I actually got past the first boss without a losing a life, which is quite interesting as this game looks really hard as you progress. Sega's magic huh.
Don't listen to the negative reviews, House of the Dead 4 is arguably the best in the series, and I hope it gets ported to the PS3 or Wii!