The world of The Walking Dead is an ugly one, but the world of The Walking Dead: Survival Instinct is hideous. It's like an alternate reality to the official canonical universe where the world is populated with clones. Either that, or the walker virus kills people and reanimates them to look like one of a few different people. Undead are undead, but there's no variety to speak of. Environmental design is dull as dishwater and unbelievably repetitive. I cannot stress this enough. Technically, this is an unsightly game full of jagged edges and boring textures. The loading times are unreasonably long for something that looks this dull. The best I can say about the visuals is that Daryl and Merle look like the actors who play them on the AMC show.
The Walking Dead: Survival Instinct gets a few audio-related things right. It uses an authentic-sounding variation on Bear McCreary's famous theme, as well as a few twists. Norman Reedus and Michael Rooker reprise their roles as Daryl and Merle Dixon, and their performances are decent enough to earn a pass from me. Daryl is restrained and laconic while Merle is, well, Merle. Sound effects are mostly alright; the sound of a hammer/baseball bat/sledgehammer/knife connecting with a skull is appropriately disgusting.