I was up late last night, just hunting through different games that I.ve never heard of. I was trying a bunch of "spinner/dial" games and stumbled across Tac/Scan. I've never heard of this game but I was addicted right away. It's pretty simple, not much brain power needed - but - the game play is fast and furious. I think what hooked me right away was the sound. There is so much loud bass in that game, the explosions through my subwoofer were making my entire arcade machine vibrate violently. This has to be the most bass filled/machine vibrating game I've found so far. Defender, my favorite game, is also very bass filled and makes the machine rock, but Tac/Scan is more.
Anyway, you may have already know about this game but if you haven't I suggest you check it out.