Rygar for the Nintendo Entertainment System is considered a rough adaptation of the arcade version. However, the main character, his weapon and pretty much all the enemies are the same the gameplay itself, is quite different.
Released in 1987 and developed by Tecmo, Rygar was a fantasy action adventure platform game while the arcade version was more of a standard side-scroller. In the NES version you guided the main character through a number of adventures on his ultimate goal of defeating the evil King Ligar. To defeat the evil king Rygar had to travel across the world and find five Indora gods who give him the items needed to defeat the king. Each of the gods are located in a different part of the world and guarded by a boss.
This was one of those games that could cause you to break your NES, the reason being that it had no saves whatsoever. The game was pretty difficult and took a long time to beat and the only way to finish was to either sit through the whole game or pause the game and go take a break. You can imagine what happened if someone unplugged the game or the power went out.