I don’t care how interesting you think your video game is, the sounds are not interesting for those around you. If a person cannot see the screen, there is absolutely no way for them to put the inane blowey-up noises to any perceivable goal. This just makes it “noise”. This is not fun for people around you. With MMOs it may be possible that the background music is at least a little bit catchy (read FFXI), but particularly in the case of RTSs it is just a cacophony of shounds that do not accomplish anything.
The only exception to this rule is Katamari Damacy. Its songs and sounds are so goddamn ridiculous that they may even be better without actually watching the screen. Dugga-Dugga, Dugga-Dugga