He came over one evening with a single duck pancake on a plate, as if presenting a rare diamond.

There, he meets a fisherman separated from his family by guerrillas and pledges to help the man rescue his son - in return for a rare diamond.

The squeamishness this induces feeds into the vibe of a tarnished world, in which no rare diamond can properly gleam.

The game also offers a bonus credit for collecting a rare diamond that appears on the playfield at random intervals.