"Still Alive": Portal credits song
i'm possibly the most rabid portal fan in existence, but sitting next to someone playing this on repeat without headphones just defies imagination. To play this song in public you need a license, and even then only twice a day, at most.
that said, if used conservatively, its one of the most pleasing experiences to suddenly and unexpectedly hear this off your shuffle'd itunes.
that or the Lvl-up sound from WoW, i haven't played it for almost a year now, but my friend loves to [lay his sound byte of it over the speakers to watch my pulse quicken and my frame twitch. Say what you like about its detrimantal effects, i loved WoW and no player ever truly lets go, i know a few other guys who quit at the same time (major exams going into year 12) and we all agree, its never truly beaten, one exp is one exp too far...
i still have WoW dreams... (you know of what i speak, fellow WoW'ers)