In the year 2090, Earth has suddenly become the target of deranged aliens. Following the invasion, a new cutting-edge weapon, the Raiden Supersonic Attack Fighter, based on the destroyed alien craft, is created for humanity's hope for survival. You pilot the "Raiden Supersonic Attack Fighter" through waves of enemies, and several levels. There are two types of weapons, and you can collect several powerups for them to make them stronger. There are bombs and missile powerups as well as collectable medals which add to the score. Raiden is one of the all-time greats in the annals of shoot 'em up history. It's not just the excellent graphics and sounds, but the engaging gameplay that keeps you addicted for ages. It's also capable of throwing up some hair-raising moments, and bullet dodging skills are pushed to the extreme. Thankfully, despite its toughness, it doesn't get too frustrating. Note that the CD version has better sound effects than the HuCard, and also additional levels. It also contains brilliant arrangements of the music.
Graphically, the game is great! It features great colors, fluid scrolling and lots of enemy sprites on screen on the screen at one time! You will immediately realize the GPU's capabilites of the PC-Engine. The game looks too close to the original arcade version! As far as the sound, the game uses pretty nice in-game catchy tunes and great sfx. A trully great shoot em up that reminded me great times on similar games on the coin-ops (arcades)!