Ok so it was the early nineties or late eighties. My friend had computer game that was two spaceships flying around asteroids style shooting at each other. The object was to destroy each other (two human players, no AI then) and you had two bars that showed firepower and shields. As you played you could move energy from one bar to the other. As you took damage the total energy available was depleted. If you shields went to zero you blew up. This game was still black and white. No idea what the name was or developer. Curious if any of you have run across this or something similar. Like the title said, shot in the dark.