I've got three in my collection currently.

Turbo - Sit-Down version

Spy Hunter - Stand-Up

Alien Vs. Predator

Every time I fire up AvP I keep expecting the board to be dead because of the short life span of the battery in the board. Only supposed to last 5 years or so but it's up to 10 and counting.

My wife won't let me get any more until we get a house. But after that.....