Rygar is an arcade game created by Tecmo in 1986 and originally released in Japan as Argus no Senshi. It is a scrolling platform game where the player assumes the role as the "Legendary Warrior", battling through a hostile landscape. Only with the attack and movements mastered would the player stand a chance of progressing through later stages.
The main feature of gameplay is using a weapon called the "Diskarmor", a shield with a long chain attached to it.
Source: Wikipedia, "Rygar (arcade game)", available under the CC-BY-SA License.