The only good sound in the game are the crickets chirping. All the people talk in another language which I can't understand. The weapons are well done, the sound effects are immersive, the up to 50 players per map support, it's all wonderful. Considering that all I have is a basically unusable D3D card and a lame 266mhz processor, I was forced to go below a 640x480 resolution to make the game remotely playable. So be seriously careful with power issues.
Control is basically perfect, the interface is well-done, and the missions are extremely immersive.
There are few problems with multiplayer missions, but single player missions use waypoints to trigger events. The problem is, a lot of waypoints in the game are in ludicrously dangerous locations, which means a high level of frustration. Since you aren't some over-powered hulk here, one or two shots will kill. And since missions are a bit long, from 30 minutes to an hour, with no way to save, it can be truly infuriating. Also, some enemies in missions are able to shoot through walls, another lame-ass glitch.