I got this achievement a few hours ago and figured I would share how. I cant read Japanese and have no idea what the name and description are. But it unlocked after I beat training on easy. Under missions and over on the far upper right are two boxes. It let me play the left one and the right one is not accessible for me yet. There were 30 little levels then it was completed. They give you a few extra ships along the way. I just kept practicing. I used the middle ship, not that it matters. I believe I got a grade of "C" so I suppose it is possible that you have to get a "C" or better. If anyone can contribute please do.