Visually, Resident Evil 4 was ahead of its time, as it feels right at home on the Xbox 360. Sure, you might not say that if you dive into this one right after playing its younger brother. The fact of the matter remains: Resident Evil 4 HD is a polished version of an already outstanding-looking game. There are some jaggies here and there, but character models are expressive and animate fluidly. Los Ganados move with purpose and menace, and they react to gunfire realistically. The user interface and inventory system is exactly the same as it was when it first released on the GameCube six years ago, and as such, it's imperfect and somewhat cumbersome. Resident Evil 5's wasn't perfect either, but it made item selection a more streamlined process. It would have been nice if the developers junked the original system in favor of the newer, faster one. Apart from that, I have no complaints with the visuals. This is still an attractive game.
While Resident Evil 4 HD is able to get away with minimal visual improvement, it really doesn't need to do any tinkering with the sound. So it doesn't. All of the music, sound effects, and voice acting present in the first release is here in all its original glory. The unnerving ambience is still a powerful aural force that puts you on the edge of your seat. The gunfire and explosions contribute to an overall sensory assault that leaves you out of breath after each large-scale Ganados encounter. The voice acting remains cheesy, but Resident Evil fans wouldn't have it any other way.