I don't know why nobody bothered TASing this yet. I loved it as a kid, I don't know how many of my mom's quarters I wasted playing it on the arcade at pizza hut. It's one of those old bullet-hell style games. It moves at a fixed pace so you can't really speed run it, but there's just so much on the screen I thought it would be funny to play it pacifist style. Because a human simply couldn't do this. I get into places a few times where you need the EXACT input for 25ish frames or you die.
Actually I'm pretty bored with running this, but if other people are interested I'll finish the last 2 levels. Here's what I've got so far, done in psxjin, levels 1-6. Let me know if I should finish the last 2. This is just of Raiden II, on General difficulty (The hardest of course.) It really doesn't start to get entertaining until level 4, so skip to 11:20 in the video to start there.
I only attack bosses and powerups, but a few times a stray enemy wanders into the splash damage and get killed inadvertently. Oh well, it doesn't really take away from the entertainment so I don't fix it.
(levels 1-6)
http://www.youtube.com/watch?v=RvY3kVTPzXo (start at 15:25 to be entertaining)
(level 7)
http://www.youtube.com/watch?v=zipGS3LHGmI (mildly entertaining)
(Level 8)
http://www.youtube.com/watch?v=asQQbX_5iYY (Very entertaining, watch this before anything else)
(pjm file of TAS)
http://schmuck-raiden-tas.googlecode.com/files/Raiden%20Project%20TAS.zip