Walther M. Gerdts, known as Mac Gerdts, is the designer of German-style board games such as Imperial, Imperial 2030, Antike and Hamburgum.
His games introduced the concept of a rondel rather than dice as a mechanism for play.
[1] This is designed to prevent players from repeatedly taking the same action in quick succession without paying a cost.
In Imperial, the game ends when a nation reaches the 25-point on the counting chart.
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