User blog comment:Gameshowguy2000/TV Guide Spotlight -TV's Greatest Game Shows DVD: a review/@comment-1623122-20190527003052

Looking at the contents, this is just Mill Creek's earlier "Classic Game Shows & More" set with Discs 3-4 removed and TV Guide branding slapped on. The fact both sets mistakenly list Win Elliot as hosting the Tic-Tac-Dough episode (it's actually Jay Jackson) would confirm this. I still recommend the set, in either case.

Regarding said TTD show, my dating was based on research done by another Internet Archive user here. I also found this eBay listing of an AP Wire photo dated January 10, 1958 which mentions that O'Rourke has won $48,100 "in six weekly appearances". While he denied having gotten help, Michael nonetheless resigned from the Army in 1959, explaining that if he were to be called to testify as part of the scandal investigations "I would prefer to appear as a civilian or as an officer of the Army whose resignation has been submitted."

Now...aside from that, I'm surprised you didn't mention Pass the Line, by far and away the dullest entry of the set (thankfully, it didn't get to series).

And regarding Twenty-One, I can confirm that at least six episodes exist - the pilot (taped 3/56), Stempel vs. Van Doren (12/5/56), Van Doren vs. Barbara Wayne (12/19/56), Van Doren vs. Ruth Miller (1/23/57), Bloomgarden vs. Snodgrass (6/3/57), and Bloomgarden vs. Craig (7/8/57).