PunksNotDead/DuoTasking
Indie games are often free, and all about ideas over high-end execution
The bassline starts, "1979" flashes up on screen and, over a scratchy recording, the voice intones "Walking down the street, I get punched; you're walking down the street, you get punched".
PunksNotDead's not going to hold your attention for more than a few minutes, but in those few minutes, this hyperkinetic, luridly day-glo explosion of punk attitude and violence encapsulates everything that's great about the indie games scene – it's the ideas, stupid (and they're free).