Ok well I was at the Philly show, and I paid like $70 to sit in the third row, and I would TOTALLY do that again.
They played music from a ton of games, and they made sure to mix it up between popular/not so popular games. Let's see if I can remember, they played Sonic, Mario, Metal Gear Solid, Beyond Good and Evil, Final Fantasy, Kingdom Hearts, Tron, Advent Rising, and Halo. I think there was more but I don't remember.
Just go you won't be disappointed.