Graphically, Metro 2033 is very well done. The level of detail on everything is simply amazing. Zoom into objects and you'll see little things like buttons that have replaced a child's teddy bear's eyes or a detailed postcard of the world before the war. Metro 2033 takes place in the subway tunnels below Moscow and sometimes on the war-ravaged surface. Before this game, I didn't realize that the Moscow subway system really was built for people to evacuate to in case of war, so the whole concept of the game is very sound and carefully constructed.
The voicework in Metro 2033 is superbly done. The accents are all Russian, but not so thick that you can't understand things. You can talk to people around you just by walking up to them, if they want to talk to you. You'll also hear a lot of background chatter when you're in the stations, exactly as you would expect to hear when you're underground in a tunnel. When you're on the surface though, the background music is very much changed! You can hear your own breathing thanks to the gas mask that you have to wear to be able to breathe. You can hear the silence of the dead world complete with the screams of the monsters that now inhabit the surface. It's altogether creepy, creepier than the underground tunnels for sure!