DonPachi

DonPachi is a vertical manic shooter (danmaku). You can choose one of the three ships (red, green and blue) with different spread of shots. Each ship has two modes of fire: the classic shots and a concentrated beam (when uses, the speed of your ship is reduced). You can also use bombs which produce two different effects according to the mode of fire you use when you launch it. During the play, you can grab power-ups to have a stronger fire and thicker beam (two P items must be collected to get one level of power-ups).
This game is a well made arcade conversion and is fun to play but you must like manic shooters if you want a high replay value for this title. This game has only one drawback: it has awful loading times (at the beginning, during each stage and when you want to take one of the other ships available after you died).
If you have the money, go for it. If not, you must buy DoDonPachi instead.