The multigame he is selling has all of the Tempest revisions, a couple of protypes, Tubes, and a vector version of breakout. The second one is just for tubes - and is free if you have a rom burner and a switch. http://www.marvin3m.com/video/tempest.htm
I am looking forward to trying this when my Tempest gets here (hopefully later this week). I played a lot of Tempest Tubes at CAX, and it is definitely a good complement to the original.