One of the greatest NES games of all-time, no exaggeration.
This game perfectly blends the genres of side-scrolling platformer and run-n-gun action game perfectly. It's 2D bliss. The gameplay mechanics are easy to pick up, yet difficult to master at the same time. Something a lot game developers have completely neglected to do nowadays. When you do master the game mechanics, the game just flows. The graphics are quite impressive for an NES game. And the music is some of the greatest music you have ever heard in an NES game.
You play as the army's latest and greatest super-soldier known simply as The Bionic Commando. Your mission is to infiltrate enemy lines, collect important information and weapons along the way, and to ultimately rescue capture soldier and American hero: Super Joe. You battle hordes of enemy soldiers and weaponry that has an uncanny resemblence to WWII Nazis. The catch is you have a bionic arm grafted to you that leaves you too heavy to jump. Instead you use your bionic arm to grapple to objects and climb them, or too swing from objects like Spider-Man or Tarzan.
Along the way you'll collect power-up items and new weapons, and the enemies and obstacles involving using your bionic become harder and harder. But NES players don't fret, even though this get can get difficult, there is a continue option, and if you play your cards right you can have unlimited continues. In between levels there is a world map you use to travel from level to level. On that world map are also "tanks", and if those tanks cross your path, you go into a bird's eye view action scene, much like the old "Commando" game. If you defeat the larger enemies in these small arcade-style stages, they will earn you continues.
I highly recommend this game. I still play it after all these years when I want to unwind, it's that good. I personally consider it to be Capcom's crowning jewel for their NES releases.