Unlike the one in the Atari 2600 version of Asteroids, this shield causes objects to bounce off of you. Sometimes these objects linger dangerously close, and that's when it pays to have a buddy around to bail you out. Your shield gradually fades away, but be sure to get your use out of it. I like how the high score is displayed at the top of the screen - taunting you to play just one more game! One element missing from this Atari 7800 translation is the mode that lets both players be "tethered" together, but I can overlook that. I do wish the programmer used brighter colors, because some of the darker ones (like purple on black) are hard to make out. Even so, Space Duel is an easy "A" thanks to its amazing fun factor. If you have an arcade-style joystick, get it out and start tapping away like it's 1982.