My two nominees for this subject: The Bob Eubanks version of "Dream House." A friend in West Virginia had a first-gen copy of the finale and after watching it, I still didn't have a firm grasp on how the main game worked. Also, the David Sparks version of "Cross-Wits." I hated it as a kid, then got nine episodes in a DVD trade, and just recently watched the DVD and remembered the problem I had with it. There were nine episodes on that disc, and at no point in the entire disc did anybody bother explaining how score was kept. For a game show that didn't have any visible score display on the set, you can see how that's a problem.
"Well, at the end of the second puzzle, Diane has 185 points, and Todd has 130 points."
"Why?"
"We'll be right back!"