I picked up Akai Katana a couple of months ago, but I just started playing it yesterday.
I have to say, it is supremely addictive. Easy to pick up and learn, extremely difficult to master. Not a game for achievement whores. But I am having so much fun with it that eventually I will get all the achievements, even if it might take a couple of years of honing my shmup skills.
[youtube]http://www.youtube.com/watch?v=7m7i9BNz1fk[/youtube]
Wish me luck on getting the 800,000,000 points achievement.
Does anybody else here like playing games like this one?