It's also a much more obscure game, my parents have a copy of it (so I played it many times in my childhood) but I've never encountered anyone else with one, nor do I remember seeing it sold.

Also we usually didn't call it by its German name "Was soll ich mich sorgen? Mach du dir Sorgen!" (more or less a direct translation of the above English), but just called it the "Selbstverteidigungskarte" (self-defense card).