Space Duel was the “true” sequel to Asteroids, adding a variety of novel features, the most notable being two-player simultaneous play. Atari had the genius (or insane?) idea of linking the two players’ ships together, creating the opportunity for both concentrated firepower and outright mayhem, as one player can thrust and send the tethered ship careening across the screen (early examples of both realistic physics and video game trolling). Space Duel also replaced the asteroids with colorful shapes that change across the levels, and added aggressive alien attackers (including some that “play catch” with their projectiles), shields and bonus levels. (One thing to note: you’ll need to have a Select button mapped as this game has you press Select to choose the game type and then Start to actually start the game.)