NO! and I like J-Rock. Rap is absolute garbage.
Just because it doesn't mix with girly games like valkyria chronicles that you'd be embarrased to describe to non gamers, doesn't make it crap.
I like girly games too like chrono trigger, but that doesnt mean that there cant be edgy shooters with rap in em here and there.
The music in a lot of games turns people off right away. For me personally I think games go for the epic score way too much. There aren't honestly a million epics, but the music likes to think so.
games don't have to be so pretentious. and they don't have to be so geeky. check out the soundtrack in midnight club 4 for soundtrack that won't embarrass you with your girlfriend.