Bio Metal (USA)
Shoot-em-up game where you shoot down alien spacecraft... pretty simple premise. This is a pretty challenging game, you'll constantly be bombarded with bullets. The trick to this game is a deploy-able shield that can eat bullets. The shield has its own meter however and the only way recharge it is to put it away. So the game is a constant management of these two factors. Also the soundtrack is by 2 Ultimate! Check it out if these things interest you.