Roundup is a one-ball payout pinball machine. Its playfield is the same as Bally's 1935 Jumbo, with some added features.
The machine has two seperate payout features, both with their own mechanics. One accompanied the 'regular' rules, just like Jumbo, and one could hand out an extra high 'Mystery Award'. This mystery award would only be lit if, at the start of the game, one of the lamps in the apron would be lit. This feature is probably random.
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