In one of the fan-made games you have to determine 25% of the price of a prize. (which is awesome for everyone who is waiting for you to do the maths there), and the contestant wins if his bid is in that range, high or low. Then you figure 20% of the next prize, then 15%, then 10%, then 5% plus or minus for the car. This is all fine and good but Walk of Fame executed it much better. Jam is a cute twist on Squeeze Play, I guess, and Shot in the Dark sounds like a convoluted version of Hangman, I think.
Plinko wouldn't suck less but if you have a d10 (and if you have one d10 you probably have more), but he could have given the relative fraction for each of the prize slots at the bottom.