This challenge consisted of several rounds...

First Round - each player has one game on each machines. The games were Addams Family, Scared Stiff and Corvette. All machines played in 'tournament mode' & points were allocated as follows :

POINTS	ADDAMS	SCARED STIFF	CORVETTE
10	300,000,000+	30,000,000+	3,000,000,000+
9	200,000,000+	20,000,000+	2,000,000,000+
8	150,000,000+	15,000,000+	1,500,000,000+
7	125,000,000+	12,000,000+	1,250,000,000+
6	100,000,000+	10,000,000+	1,000,000,000+
5	75,000,000+	7,500,000+	750,000,000+
4	50,000,000+	5,000,000+	500,000,000+
3	30,000,000+	3,000,000+	300,000,000+
2	20,000,000+	2,000,000+	200,000,000+
1	10,000,000+	1,000,000+	100,000,000+
0	less than 10,000,000	less than 1,000,000 or ball bought in	less than 100,000,000 or ball bought in