The Xbox 360 is capable of some really nice visuals, but it's abundantly clear that Breach doesn't put a whole lot of pressure on the hardware. However, unimpressive is not synonymous with ugly. Breach is clearly aiming for the military simulation motif, and as a result, it kind of looks like something a military force would use as a training program. It looks low-budget, but it's got a very utilitarian feel to it. That's not always a bad thing. It just won't wow you, that's all.
When I say that nearly everything about Breach is generic, the statement encompasses just that: nearly everything. Sound design included. There isn't much music, though that's certainly true of the multiplayer component of most shooters. The main menu features a pounding drum and the occasional tolling of a bell set against a backdrop of comm chatter. It's completely shrug worthy, but since it's all just a means to an end, the déjà vu is easy to ignore. Weapons fire and explosions sound fine, though none of it will drive you to invest in a quality sound system or a really nice set of headphones. Again, it's utilitarian through and through -- only there to help sell the illusion.