So this was a joke ... maybe a translation problem but I don't get the joke :(
There are other Spec Ops games, all of which are older than The Line. Spec Ops: The Line was named that because it raises the moral question of where the line is. What behavior is over the line, and what behavior is not? I'm sure you also know the other definition of the word "line", which is a mark or stroke long in proportion to its breadth, made with a pen, pencil, tool, etc., on a surface. A rhombus is a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.