Same if a person drops a key or small item, you may not see them on some of the ground textures. Multiplayer is good. Though more than 6 people on a server will start to bog down, it is livable. Graphics are ok. They toned them down probably to allow the game to run on slower systems.
Sound is decent.
I'm here to brag about CNE's multiplayer, which is the most fun you'll have since Doom first came out. I kid you not. Eagle's multiplayer game. This isn't CTF, where tactics and strategy take on whole new meaning. Models aren't great, but they're animated decently.