Golgo 13: The Mafat Conspiracy

There's so much to say about this game. It's absolutely fantastic. The storyline is good for an NES game, the characters are memorable and has one of the best endings out of any other game on the platform. The different sequences are all fine tuned to automatically launch this to the top of my favorites. The music is well done and tastefully used depending on the scenario you find yourself in.
This game is far superior to the original Golgo 13 in my personal opinion. However, sharpen your map making skills cause you will need it to beat the game.