Place a line of string/chalk line/line of tees etc or use the edge of the putting Green as a target line.
Players putt to get the ball as near to the target line as possible without 'going over the cliff'. Teams can have a set number of balls; the winner could be the team with the greater number of balls within a set area close to the target.
Easier: Putt from closer to the target.
Harder:Putt from further away from target. Set up no go areas and hazards. Minus points for going over.
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