Hehe, I have a copy of Robo Warrior for my NES! It's an amusing little game with some cool music. It is kind of difficult though, you have a hard time finding the exits and your health drains over time. You have to keep blowing stuff up to find more health. You also get a gun in addition to the bombs. It's not very powerful but you can find items to boost the range and such. I've always been amused by the similarity of that game to bomberman even since I was a kid.